Jonsered 2245 User Manual
CS 2245  
CS2245S  
CS 2250S  
Operator’s manual EPA III English  
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.  
CONTENTS  
FEDERAL EMISSION CONTROL WARRANTY  
STATEMENT  
Contents  
KEY TO SYMBOLS  
YOUR WARRANTY RIGHTS AND OBLIGATIONS 42  
Symbols on the machine: .....................................  
Symbols in the operator’s manual: .......................  
CONTENTS  
2
2
AMERICAN STANDARD SAFETY  
PRECAUTIONS  
Safety precautions for chain saw users ................ 43  
Contents ...............................................................  
INTRODUCTION  
3
4
5
Dear customer! .....................................................  
WHAT IS WHAT?  
What is what on the chain saw? ...........................  
GENERAL SAFETY PRECAUTIONS  
Before using a new chain saw ..............................  
Important ..............................................................  
Always use common sense ..................................  
Personal protective equipment .............................  
Machine′s safety equipment .................................  
6
6
7
7
7
Cutting equipment ................................................ 10  
ASSEMBLY  
Fitting the bar and chain ....................................... 17  
FUEL HANDLING  
Fuel ...................................................................... 19  
Fueling .................................................................. 20  
Fuel safety ............................................................ 20  
STARTING AND STOPPING  
Starting and stopping ........................................... 21  
WORKING TECHNIQUES  
Before use: ........................................................... 23  
General working instructions ................................ 23  
How to avoid kickback .......................................... 29  
MAINTENANCE  
General ................................................................. 31  
Carburetor adjustment .......................................... 31  
Checking, maintaining and servicing chain saw  
safety equipment .................................................. 31  
Muffler .................................................................. 33  
Starter .................................................................. 34  
Air filter ................................................................. 35  
Spark plug ............................................................ 36  
Lubricating the bar tip sprocket ............................ 36  
Needle bearing lubrication ................................... 36  
Cooling system ..................................................... 36  
”Turbo Air Cleaning” centrifugal cleaning .............. 37  
Winter use ............................................................ 37  
Maintenance schedule ......................................... 38  
TECHNICAL DATA  
Technical data ...................................................... 39  
Bar and chain combinations ................................. 40  
Saw chain filing and file gauges ........................... 41  
English – 3  
INTRODUCTION  
Dear customer!  
Congratulations on your choice to buy a Jonsered product!  
Your purchase gives you access to professional help with repairs and service whenever this may be necessary. If the  
retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest servicing dealer.  
It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this  
operator′s manual as a valuable document. By following its′ content (using, service, maintenance etc) the life span and  
the second-hand value of the machine can be extended.If you ever lend or sell this machine, make sure that the borrower  
or buyer gets the operator′s manual, so they will also know how to properly maintain and use it.  
Good luck on using your Jonsered machine!  
Jonsered has a policy of continuous product development and therefore reserves the right to modify the design and  
appearance of products without prior notice.  
4 – English  
WHAT IS WHAT?  
1
2
3
5
4
13  
12  
28  
14  
27  
23  
6
11  
10  
9
15  
8
7
31  
26  
18  
17  
30  
16  
19  
29  
20  
25  
21  
24  
23  
22  
What is what on the chain saw?  
1
2
3
4
5
6
7
8
9
Cylinder cover  
Decompression valve  
Air purge  
17 Chain  
18 Bar tip sprocket  
19 Bar  
Start reminder  
20 Bumper spike  
21 Chain catcher  
Combined start and stop switch  
Rear handle  
22 Chain tensioning screw  
23 Clutch cover  
Information and warning decal  
Fuel tank  
24 Right hand guard  
25 Throttle control  
26 Throttle lockout  
Adjuster screws carburetor  
10 Starter handle  
11 Starter  
27 Chain tensioner wheel (CS 2245S, CS 2250S)  
28 Knob (CS 2245S, CS 2250S)  
29 Operator’s manual (EPA)  
30 Bar guard  
12 Chain oil tank  
13 Product and serial number plate  
14 Front handle  
15 Front hand guard  
16 Muffler  
31 Combination spanner  
English – 5  
GENERAL SAFETY PRECAUTIONS  
Before using a new chain saw  
WARNING! Never allow children to use or  
be in the vicinity of the machine. As the  
machine is equipped with a spring-  
loaded stop switch and can be started by  
low speed and force on the starter  
handle, even small children under some  
circumstances can produce the force  
necessary to start the machine.This can  
mean a risk of serious personal injury.  
Therefore remove the spark plug cap  
when the machine is not under close  
supervision.  
•
Please read this manual carefully.  
!
•
Check that the cutting equipment is correctly fitted  
and adjusted. See instructions under the heading  
Assembly.  
•
•
•
Refuel and start the chain saw. See the instructions  
under the headings Fuel Handling and Starting and  
Stopping.  
Do not use the chain saw until sufficient chain oil has  
reached the chain. See instructions under the  
heading Lubricating cutting equipment.  
Long-term exposure to noise can result in permanent  
hearing impairment. So always use approved hearing  
protection.  
Important  
IMPORTANT!  
The machine is only designed for cutting wood.  
WARNING! Under no circumstances may  
the design of the machine be modified  
You should only use the saw with the bar and chain  
combinations we recommend in the chapter Technical  
data.  
!
without the permission of the  
manufacturer. Always use genuine  
accessories. Non-authorized  
modifications and/or accessories can  
result in serious personal injury or the  
death of the operator or others.Your  
warranty may not cover damage or  
liability caused by the use of non-  
authorized accessories or replacement  
parts.  
Never use the machine if you are fatigued, while under  
the influence of alcohol or drugs, medication or anything  
that could affect your vision, alertness, coordination or  
judgement.  
Wear personal protective equipment. See instructions  
under the heading Personal protective equipment.  
Do not modify this product or use it if it appears to have  
been modified by others.  
WARNING! A chain saw is a dangerous  
tool if used carelessly or incorrectly and  
can cause serious, even fatal injuries. It  
is very important that you read and  
understand the contents of this  
operator’s manual.  
Never use a machine that is faulty. Carry out the checks,  
maintenance and service instructions described in this  
manual. Some maintenance and service measures  
must be carried out by trained and qualified specialists.  
See instructions under the heading Maintenance.  
!
Never use any accessories other than those  
recommended in this manual. See instructions under  
the headings Cutting equipment and Technical data.  
WARNING! The inside of the muffler  
contain chemicals that may be  
carcinogenic. Avoid contact with these  
elements in the event of a damaged  
muffler.  
!
CAUTION! Always wear protective glasses or a face  
visor to reduce the risk of injury from thrown objects. A  
chain saw is capable of throwing objects, such as wood  
chips, small pieces of wood, etc, at great force.This can  
result in serious injury, especially to the eyes.  
WARNING! Long term inhalation of the  
engine’s exhaust fumes, chain oil mist  
and dust from sawdust can represent a  
health risk.  
!
WARNING! Running an engine in a  
confined or badly ventilated area can  
result in death due to asphyxiation or  
carbon monoxide poisoning.  
!
WARNING! The ignition system of this  
machine produces an electromagnetic  
!
WARNING! Faulty cutting equipment or  
the wrong combination of bar and saw  
chain increases the risk of kickback!  
Only use the bar/saw chain combinations  
we recommend, and follow the filing  
instructions. See instructions under the  
heading Technical data.  
field during operation.This field may  
under some circumstances interfere with  
pacemakers.To reduce the risk of  
serious or fatal injury, we recommend  
persons with pacemakers to consult  
their physician and the pacemaker  
manufacturer before operating this  
machine.  
!
6 – English  
GENERAL SAFETY PRECAUTIONS  
•
Boots with saw protection, steel toe-cap and non-slip  
sole  
Always use common sense  
It is not possible to cover every conceivable situation you  
can face when using a chain saw. Always exercise care and  
use your common sense. Avoid all situations which you  
consider to be beyond your capability. If you still feel  
uncertain about operating procedures after reading these  
instructions, you should consult an expert before continuing.  
Do not hesitate to contact your dealer or us if you have any  
questions about the use of the chain saw.We will willingly be  
of service and provide you with advice as well as help you to  
use your chain saw both efficiently and safely. Attend a  
training course in chain saw usage if possible.Your dealer,  
forestry school or your library can provide information about  
which training materials and courses are available.  
•
•
Always have a first aid kit nearby.  
Fire Extinguisher and Shovel  
Generally clothes should be close-fitting without  
restricting your freedom of movement.  
IMPORTANT! Sparks can come from the muffler, the bar  
and chain or other sources. Always have fire  
extinguishing tools available if you should need them.  
Help prevent forest fires.  
′
Machine s safety equipment  
In this section the machine’s safety features and their  
function are explained. For inspection and maintenance  
see instructions under the heading Checking, maintaining  
and servicing chain saw safety equipment. See  
instructions under the heading, What is what?, to find  
where these parts are located on your machine.  
The life span of the machine can be reduced and the risk  
of accidents can increase if machine maintenance is not  
carried out correctly and if service and/or repairs are not  
carried out professionally. If you need further information  
please contact your nearest servicing dealer.  
Work is constantly in progress to improve the design and  
technology - improvements that increase your safety and  
efficiency. Visit your dealer regularly to see whether you  
can benefit from new features that have been introduced.  
Personal protective equipment  
WARNING! Never use a machine with  
defective safety components. Safety  
!
WARNING! Most chain saw accidents  
equipment must be inspected and  
maintained. See instructions under the  
heading Checking, maintaining and  
servicing chain saw safety equipment. If  
your machine does not pass all the  
checks, take the saw to a servicing  
dealer for repair.  
happen when the chain touches the  
!
operator.You must use approved  
personal protective equipment whenever  
you use the machine. Personal protective  
equipment cannot eliminate the risk of  
injury but it will reduce the degree of  
injury if an accident does happen. Ask  
your dealer for help in choosing the right  
equipment.  
Chain brake and front hand guard  
Your chain saw is equipped with a chain brake that is  
designed to stop the chain if you get a kickback.The chain  
brake reduces the risk of accidents, but only you can  
prevent them.  
Take care when using your saw and make sure the  
kickback zone of the bar never touches any object.  
•
•
•
•
•
Approved protective helmet  
Hearing protection  
Protective goggles or a visor  
Gloves with saw protection  
Trousers with saw protection  
English – 7  
GENERAL SAFETY PRECAUTIONS  
•
•
The chain brake (A) can either be activated manually  
(by your left hand) or automatically by the inertia  
release mechanism.  
•
To release the chain brake pull the front hand guard  
backwards, towards the front handle.  
The brake is applied when the front hand guard (B) is  
pushed forwards.  
•
Kickback can be very sudden and violent. Most  
kickbacks are minor and do not always activate the  
chain brake. If this happens you should hold the chain  
saw firmly and not let go.  
•
This movement activates a spring-loaded mechanism  
that tightens the brake band (C) around the engine  
drive system (D) (clutch drum).  
•
The way the chain brake is activated, either manually  
or automatically by the inertia release mechanism,  
depends on the force of the kickback and the position  
of the chain saw in relation to the object that the  
kickback zone of the bar strikes.  
•
The front hand guard is not designed solely to activate  
the chain brake. Another important feature is that it  
reduces the risk of your left hand hitting the chain if  
you lose grip of the front handle.  
If you get a violent kickback while the kickback zone of  
the bar is farthest away from you the chain brake is  
designed to be activated by the inertia in the kickback  
direction.  
•
The chain brake must be engaged when the chain  
saw is started to prevent the saw chain from rotating.  
•
Use the chain brake as a ”parking brake” when  
starting and when moving over short distances, to  
reduce the risk of moving chain accidentally hitting  
your leg or anyone or anything close by.  
If the kickback is less violent or the kickback zone of  
the bar is closer to you the chain brake is designed to  
be activated manually by the movement of your left  
hand.  
•
In the felling position the left hand is in a position that  
makes manual activation of the chain brake  
impossible. With this type of grip, that is when the left  
hand is placed so that it cannot affect the movement  
8 – English  
GENERAL SAFETY PRECAUTIONS  
of the front hand guard, the chain brake can only be  
activated by the inertia action.  
(A) (i.e.when you grasp the handle) it releases the throttle  
control (B). When you release the handle the throttle  
control and the throttle lockout both move back to their  
original positions. This arrangement means that the  
throttle control is automatically locked at the idle setting.  
Will my hand always activate the chain  
brake during a kickback?  
No. It takes a certain force to move the hand guard  
forward. If your hand only lightly touches the front guard  
or slips over it, the force may not be enough to trigger the  
chain brake.You should also maintain a firm grip of the  
chain saw handles while working. If you do and  
experience a kickback, your hand may never leave the  
front handle and will not activate the chain brake, or the  
chain brake will only activate after the saw has swung  
around a considerable distance. In such instances, the  
chain brake might not have enough time to stop the saw  
chain before it touches you.  
Chain catcher  
The chain catcher is designed to catch the chain if it  
snaps or jumps off. Replace it if necessary with an  
aluminium chain catcher (is available as spare part).This  
should not happen if the chain is properly tensioned (see  
instructions under the heading Assembly) and if the bar  
and chain are properly serviced and maintained (see  
instructions under the heading General working  
instructions).  
There are also certain positions in which your hand  
cannot reach the front hand guard to activate the chain  
brake; for example, when the saw chain is held in felling  
position.  
Will my inetria activated chain brake  
always activate during kickback in the  
event of a kickback?  
No. First your brake must be in working order.Testing the  
brake is simple, see instructions under the heading  
Checking, maintaining and servicing chain saw safety  
equipment.We recommend you do before you begin each  
work session. Second the kickback must be strong  
enough to activate the chain brake. If the chain brake is  
too sensitive it would activate all the time which would be  
a nuisance.  
Right hand guard  
Apart from protecting your hand if the chain jumps or  
snaps, the right hand guard stops branches and twigs  
from interfering with your grip on the rear handle.  
Will my chain brake always protect me  
from injury in the event of a kickback?  
No. First, the chain brake must be in working order to  
provide the intended protection. Second, it must be  
activated during the kickback as described above to stop  
the saw chain.Third, the chain brake may be activated but  
if the bar is too close to you the brake might not have  
enough time to slow down and stop the chain before the  
chain saw hits you.  
Only you and proper working technique can eliminate  
kickback and its danger.  
Throttle lockout  
The throttle lockout is designed to prevent accidental  
operation of the throttle control. When you press the lock  
English – 9  
GENERAL SAFETY PRECAUTIONS  
Vibration damping system  
Muffler  
Your machine is equipped with a vibration damping  
system that is designed to reduce vibration and make  
operation easier.  
The muffler is designed to keep noise levels to a minimum  
and to direct exhaust fumes away from the user.  
WARNING! The exhaust fumes from the  
engine are hot and may contain sparks  
!
which can start a fire. Never start the  
machine indoors or near combustible  
material!  
The machine′s vibration damping system reduces the  
transfer of vibration between the engine unit/cutting  
equipment and the machine′s handle unit.The body of the  
chain saw, including the cutting equipment, is insulated  
from the handles by vibration damping units.  
In areas with a hot, dry climate there is a high risk of fires.  
These areas are sometimes subject to government rules  
requiring among other things the muffler must be  
equipped with an approved type of spark arrestor screen.  
Cutting hardwoods (most broadleaf trees) creates more  
vibration than cutting softwoods (most conifers). Cutting  
with cutting equipment that is blunt or faulty (wrong type  
or badly sharpened) will increase the vibration level.  
CAUTION! The muffler gets very hot during and after  
use.This also applies during idling. Be aware of the fire  
hazard, especially when working near flammable  
substances and/or vapours.  
WARNING! Never use a saw without a  
muffler, or with a damaged muffler. A  
!
damaged muffler may substantially  
increase the noise level and the fire  
hazard. Keep fire fighting equipment  
handy. If a spark arrestor screen is  
required in your area, never use the saw  
without or with a broken spark arrestor  
screen.  
WARNING! Overexposure to vibration  
can lead to circulatory damage or nerve  
!
damage in people who have impaired  
circulation. Contact your doctor if you  
experience symptoms of overexposure  
to vibration. Such symptoms include  
numbness, loss of feeling, tingling,  
pricking, pain, loss of strength, changes  
in skin colour or condition.These  
symptoms normally appear in the  
fingers, hands or wrists.These  
Cutting equipment  
This section describes how to choose and maintain your  
cutting equipment in order to:  
•
•
Reduce the risk of kickback.  
symptoms may be increased in cold  
temperatures.  
Reduce the risk of the saw chain breaking or jumping  
off the bar.  
Stop switch  
•
•
•
Obtain optimal cutting performance.  
Extend the life of cutting equipment.  
Avoid increasing vibration levels.  
Use the stop switch to switch off the engine.  
General rules  
•
Only use cutting equipment recommended by us!  
See instructions under the heading Technical data.  
10 – English  
GENERAL SAFETY PRECAUTIONS  
•
Keep the chain’s cutting teeth properly  
Chain  
sharpened! Follow our instructions and use the  
recommended file gauge. A damaged or badly  
sharpened chain increases the risk of accidents.  
A chain is made up of a number of links, which are  
available in standard and low-kickback versions.  
IMPORTANT! No saw chain design eliminates the  
danger of kickback.  
WARNING! Any contact with a rotating  
saw chain can cause extremely serious  
injuries.  
!
•
Maintain the correct depth gauge setting! Follow  
our instructions and use the recommended depth  
gauge clearance. Too large a clearance increases  
the risk of kickback.  
Some terms that describe the bar and chain  
To maintain the safety features of the cutting equipment,  
you should replace a worn or damaged bar or chain with  
a bar and chain combinations recommended by  
Jonsered. See instructions under the heading Technical  
Data for a list of replacement bar and chain combinations  
we recommend.  
Bar  
•
•
Keep the chain properly tensioned! If the chain is  
slack it is more likely to jump off and lead to increased  
wear on the bar, chain and drive sprocket.  
•
Length (inches/cm)  
•
Number of teeth on bar tip sprocket (T).  
Keep cutting equipment well lubricated and  
properly maintained! A poorly lubricated chain is  
more likely to break and lead to increased wear on the  
bar, chain and drive sprocket.  
•
•
Chain pitch (inches). The spacing between the drive  
links of the chain must match the spacing of the teeth  
on the bar tip sprocket and drive sprocket.  
Number of drive links. The number of drive links is  
determined by the length of the bar, the chain pitch  
and the number of teeth on the bar tip sprocket.  
Cutting equipment designed to reduce  
kickback  
WARNING! Faulty cutting equipment or  
the wrong combination of bar and saw  
!
chain increases the risk of kickback!  
Only use the bar/saw chain combinations  
we recommend, and follow the filing  
instructions. See instructions under the  
heading Technical data.  
•
Bar groove width (inches/mm). The groove in the bar  
must match the width of the chain drive links.  
The only way to avoid kickback is to make sure that the  
kickback zone of the bar never touches anything.  
By using cutting equipment with ”built-in” kickback  
reduction and keeping the chain sharp and well-  
maintained you can reduce the effects of kickback.  
Bar  
The smaller the tip radius the lower the chance of  
kickback.  
English – 11  
GENERAL SAFETY PRECAUTIONS  
•
Chain oil hole and hole for chain tensioner. The bar  
must be matched to the chain saw design.  
When you sharpen a cutting tooth there are four important  
factors to remember.  
1
Filing angle  
Chain  
•
Chain pitch (inches)  
2
Cutting angle  
•
Drive link width (mm/inches)  
3
4
File position  
Round file diameter  
•
Number of drive links.  
It is very difficult to sharpen a chain correctly without the  
right equipment. We recommend that you use our file  
gauge. This will help you obtain the maximum kickback  
reduction and cutting performance from your chain.  
Sharpening your chain and adjusting  
depth gauge setting  
General information on sharpening cutting teeth  
•
Never use a blunt chain. When the chain is blunt you  
have to exert more pressure to force the bar through  
the wood and the chips will be very small. If the chain  
is very blunt it will produce wood powder and no chips  
or shavings.  
•
A sharp chain eats its way through the wood and  
produces long, thick chips or shavings.  
See instructions under the heading Technical data for  
information about sharpening your chain.  
WARNING! Departure from the  
sharpening instructions considerably  
increases the risk of kickback.  
!
Sharpening cutting teeth  
•
The cutting part of the chain is called the cutter and  
consists of a cutting tooth (A) and the depth gauge  
(B). The cutters cutting depth is determined by the  
difference in height between the two (depth gauge  
setting).  
To sharpen cutting teeth you will need a round file and a  
file gauge. See instructions under the heading Technical  
data for information on the size of file and gauge that are  
recommended for the chain fitted to your chain saw.  
12 – English  
GENERAL SAFETY PRECAUTIONS  
•
•
Check that the chain is correctly tensioned. A slack  
chain will move sideways, making it more difficult to  
sharpen correctly.  
acheive the correct depth gauge setting and bevel for  
the depth gauge.  
Always file cutting teeth from the inside face. Reduce  
the pressure on the return stroke. File all the teeth on  
one side first, then turn the chain saw and file the teeth  
on the other side.  
•
Place the depth gauge tool over the chain. Detailed  
information regarding the use of the depth gauge tool,  
will be found on the package for the depth gauge tool.  
Use the flat file to file off the tip of the depth gauge that  
protrudes through the depth gauge tool. The depth  
gauge setting is correct when you no longer feel  
resistance as you draw the file along the depth gauge  
tool.  
•
File all the teeth to the same length. When the length  
of the cutting teeth is reduced to 0.16 inch (4 mm) the  
chain is worn out and should be replaced.  
Tensioning the chain  
WARNING! A slack chain may jump off  
the bar and cause serious or even fatal  
injury.  
!
General advice on adjusting depth gauge setting  
•
When you sharpen the cutting tooth (A) the depth  
gauge setting (C) will decrease. To maintain optimal  
cutting performance the depth gauge (B) has to be  
filed down to achieve the recommended depth gauge  
setting. See instructions under the heading Technical  
data to find the correct depth gauge setting for your  
particular chain.  
The more you use a chain the longer it becomes. It is  
therefore important to adjust the chain regularly to take up  
the slack.  
Check the chain tension every time you refuel. NOTE! A  
new chain has a running-in period during which you  
should check the tension more frequently.  
Tension the chain as tightly as possible, but not so tight  
that you cannot pull it round freely by hand.  
WARNING! The risk of kickback is  
increased if the depth gauge setting is  
too large!  
!
Adjustment of depth gauge setting  
CS 2245  
•
•
The cutting teeth should be newly sharpened before  
adjusting the depth gauge setting. We recommend  
that you adjust the depth gauge setting every third  
time you sharpen the cutting teeth. NOTE! This  
recommendation assumes that the length of the  
cutting teeth is not reduced excessively.  
•
Loosen the bar nuts that hold the clutch cover/chain  
brake. Use the combination spanner.Then tighten the  
bar nuts by hand as tight as you can.  
You will need a flat file and a depth gauge tool. We  
recommend that you use our depth gauge tool to  
English – 13  
GENERAL SAFETY PRECAUTIONS  
•
Raise the tip of the bar and stretch the chain by  
•
Adjust the tension on the chain by turning the wheel  
tightening the chain tensioning screw using the  
combination spanner. Tighten the chain until it does  
not sag from the underside of the bar.  
down (+) for tighter tension and up (-) to loosen the  
tension.  
•
Use the combination spanner to tighten the bar nuts  
while lifting the tip of the bar at the same time. Check  
that you can pull the chain round freely by hand and  
that it does not sag from the underside of the bar.  
•
Tighten the bar clutch by turning the knob clockwise.  
The position of the chain tensioning screw on our chain  
saws varies from model to model. See instructions under  
the heading What is what? to find out where it is on your  
model.  
CS 2245S, CS 2250S  
•
Fold the knob back in to lock the tensioning.  
•
Release the knob by folding it out.  
•
Turn the knob anti clockwise to loosen the bar cover.  
Lubricating cutting equipment  
WARNING! Poor lubrication of cutting  
equipment may cause the chain to snap,  
which could lead to serious, even fatal  
injuries.  
!
Chain oil  
Chain oil must demonstrate good adhesion to the chain  
and also maintain its flow characteristics regardless of  
whether it is warm summer or cold winter weather.  
As a chain saw manufacturer we have developed an  
optimal chain oil which has a vegetable oil base. We  
recommend the use of our own oil for both maximum  
chain life and to minimise environmental damage. If our  
own chain oil is not available, standard chain oil is  
recommended.  
14 – English  
GENERAL SAFETY PRECAUTIONS  
Never use waste oil! Using waste oil can be dangerous  
If the chain lubrication is not working:  
to you and damage the machine and environment.  
•
Check that the oil channel in the bar is not obstructed.  
Clean if necessary.  
IMPORTANT! When using vegetable based saw chain  
oil, dismantle and clean the groove in the bar and saw  
chain before long-term storage.Otherwise there is a risk  
of the saw chain oil oxidizing, which will result in the saw  
chain becoming stiff and the bar tip sprocket jamming.  
Filling with chain oil  
•
All our chain saws have an automatic chain lubrication  
system. On some models the oil flow is also  
adjustable.  
•
Check that the groove in the edge of the bar is clean.  
Clean if necessary.  
•
The saw chain oil tank and the fuel tank are designed  
so that the fuel runs out before the saw chain oil.  
•
Check that the bar tip sprocket turns freely and that  
the lubricating hole in the tip sprocket is not blocked.  
Clean and lubricate if necessary.  
However, this safety feature requires that you use the  
right sort of chain oil (if the oil is too thin it will run out  
before the fuel), and that you adjust the carburetor as  
recommended (a lean mixture may mean that the fuel  
lasts longer than the oil) and that you also use the  
recommended cutting equipment (a bar that is too  
long will use more chain oil).  
Checking chain lubrication  
•
Check the chain lubrication each time you refuel. See  
instructions under the heading Lubricating the bar tip  
sprocket.  
If the chain lubrication system is still not working after  
carrying out the above checks and associated measures  
you should contact your servicing dealer.  
Aim the tip of the bar at a light coloured surface about  
20 cm (8 inches) away. After 1 minute running at 3/4  
throttle you should see a distinct line of oil on the light  
surface.  
Chain drive sprocket  
The clutch drum is fitted with one of the following drive  
sprockets:  
A
Spur sprocket (the chain sprocket is welded on the  
drum)  
B
Rim sprocket (replaceable)  
Regularly check the degree of wear on the drive sprocket.  
Replace if wear is excessive. Replace the drive sprocket  
whenever you replace the chain.  
English – 15  
GENERAL SAFETY PRECAUTIONS  
Needle bearing lubrication  
•
Whether the tip of the bar is uneven or badly worn. If  
a hollow forms on the underside of the bar tip this is  
due to running with a slack chain.  
Both versions of sprockets have a needle bearing on the  
drive shaft, which has to be greased regularly (once a  
week).CAUTION! Use only high quality bearing grease or  
engine oil.  
•
To prolong the life of the bar you should turn it over  
daily.  
Checking wear on cutting equipment  
WARNING! Most chain saw accidents  
happen when the chain touches the  
operator.  
!
Check the chain daily for:  
Wear personal protective equipment. See  
instructions under the heading Personal  
protective equipment.  
Do not tackle any job that you feel you  
are not adequately trained for. See  
instructions under the headings  
Personal protective equipment, How to  
avoid kickback, Cutting equipment and  
General working instructions.  
•
•
•
Visible cracks in rivets and links.  
Whether the chain is stiff.  
Avoid situations where there is a risk of  
kickback. See instructions under the  
Whether rivets and links are badly worn.  
Replace the saw chain if it exhibits any of the points  
above.  
′
heading Machine s safety equipment.  
Use the recommended protective  
equipment and check its condition. See  
instructions under the heading General  
working instructions.  
We recommend you compare the existing chain with a  
new chain to decide how badly the existing chain is worn.  
When the length of the cutting teeth has worn down to  
only 0.16 inch (4 mm) the chain must be replaced.  
Check that all the chain saw safety  
features are working. See instructions  
under the headings General working  
instructions and General safety  
precautions.  
Bar  
Check regularly:  
•
Whether there are burrs on the edges of the bar.  
Remove these with a file if necessary.  
•
Whether the groove in the bar has become badly  
worn. Replace the bar if necessary.  
16 – English  
ASSEMBLY  
should be tensioned until it does not sag from the  
underside of the bar.  
Fitting the bar and chain  
WARNING! Always wear gloves, when  
working with the chain.  
!
The chain is correctly tensioned when it does not sag from  
the underside of the bar, but can still be turned easily by  
hand. Hold up the bar tip and tighten the bar nuts with the  
combination spanner.  
CS 2245  
Check that the chain brake is in disengaged position by  
moving the front hand guard towards the front handle.  
Unscrew the bar nut and remove the clutch cover (chain  
brake). Take off the transportation ring (A).  
When fitting a new chain, the chain tension has to be  
checked frequently until the chain is run-in. Check the  
chain tension regularly. A correctly tensioned chain  
ensures good cutting performance and long life.  
Fit the bar over the bar bolts. Place the bar in its rearmost  
position. Place the chain over the drive sprocket locate it  
in the groove on the bar. Begin on the top edge of the bar.  
CS 2245S, CS 2250S  
Check that the chain brake is in disengaged position by  
moving the front hand guard towards the front handle.  
Make sure that the edges of the cutting links are facing  
forward on the top edge of the bar.  
Loosen the chain tensioner wheel and remove the clutch  
cover (chain brake). Remove the transport guard.  
Fit the clutch cover and locate the chain adjuster pin in the  
hole in the bar. Check that the drive links of the chain fit  
correctly over the drive sprocket and that the chain is  
correctly located in the groove in the bar. Tighten the bar  
nut finger-tight.  
Tension the chain by turning the chain tensioning screw  
clockwise using the combination spanner. The chain  
English – 17  
ASSEMBLY  
Fit the bar over the bar bolts. Place the bar in its rearmost  
position. Place the chain over the drive sprocket locate it  
in the groove on the bar. Begin on the top edge of the bar.  
Make sure that the edges of the cutting links are facing  
forward on the top edge of the bar.  
Fit the clutch cover and locate the chain adjuster pin in the  
hole in the bar. Check that the drive links of the chain fit  
correctly over the drive sprocket and that the chain is  
correctly located in the groove in the bar.  
Tension the chain by turning the wheel down (+). The  
chain should be tensioned until it does not sag from the  
underside of the bar.  
The chain is correctly tensioned when it does not sag from  
the underside of the bar, but can still be turned easily by  
hand. Hold up the bar tip and tighten the bar knob by  
turning the knob clockwise.  
When fitting a new chain, the chain tension has to be  
checked frequently until the chain is run-in. Check the  
chain tension regularly. A correctly tensioned chain  
ensures good cutting performance and long life.  
18 – English  
FUEL HANDLING  
Mixing ratio  
1:50 (2%) for all engines.  
Fuel  
Note! The machine is equipped with a two-stroke engine  
and must always be run using a mixture of gasoline and  
two-stroke oil. It is important to accurately measure the  
amount of oil to be mixed to ensure that the correct  
mixture is obtained. When mixing small amounts of fuel,  
even small inaccuracies can drastically affect the ratio of  
the mixture.  
Gasoline, litre  
Two-stroke oil, litre  
2% (1:50)  
0,10  
5
10  
0,43/0,20  
0,30  
15  
20  
0,40  
WARNING! Always ensure there is  
adequate ventilation when handling fuel.  
US gallon  
US fl. oz.  
2 1/2  
!
1
2 1/2  
5
6 1/2  
Gasoline  
12 7/8  
Mixing  
•
•
Use good quality unleaded gasoline.  
CAUTION! Engines equipped with catalytic  
converters must be run on unleaded fuel  
mixtures.  
•
The lowest recommended octane grade is 87  
((RON+MON)/2). If you run the engine on a lower  
octane grade than 87 so-called knocking can occur.  
This gives rise to a high engine temperature and  
increased bearing load, which can result in serious  
engine damage.  
•
•
Always mix the gasoline and oil in a clean container  
intended for fuel.  
Always start by filling half the amount of the gasoline to  
be used.Then add the entire amount of oil. Mix (shake)  
the fuel mixture. Add the remaining amount of gasoline.  
Mix (shake) the fuel mixture thoroughly before filling  
the machine’s fuel tank.  
Do not mix more than one month’s supply of fuel at a  
time.  
If the machine is not used for some time the fuel tank  
should be emptied and cleaned.  
•
When working with continuous high revs (e.g.limbing)  
a higher octane is recommended.  
Environment fuel  
•
•
•
JONSERED recommends the use of alkylate fuel or  
environment fuel for four-stroke engines blended with two-  
stroke oil as set out below. Note that carburetor  
adjustment may be necessary when changing the type of  
fuel (see instructions under the heading Carburetor).  
Running-in  
Chain oil  
Avoid running at a too high speed for extended periods  
during the first 10 hours.  
•
We recommend the use of special oil (chain oil) with  
good adhesion characteristics.  
Two-stroke oil  
•
•
•
For best results and performance use JONSERED  
two-stroke engine oil, which is specially formulated for  
our air-cooled two stroke-engines.  
Never use two-stroke oil intended for water-cooled  
engines, sometimes referred to as outboard oil (rated  
TCW).  
Never use oil intended for four-stroke engines.  
•
•
•
Never use waste oil. This results in damage to the oil  
pump, the bar and the chain.  
It is important to use oil of the right grade (suitable  
viscosity range) to suit the air temperature.  
In temperatures below 32°F (0°C) some oils become  
too viscous.This can overload the oil pump and result  
in damage to the oil pump components.  
•
Contact your service agent when choosing chain oil.  
English – 19  
FUEL HANDLING  
•
Move the machine at least 10 ft (3 m) from the  
refuelling point before starting it.  
Fueling  
WARNING! Taking the following  
precautions, will lessen the risk of fire:  
!
Do not smoke and do not place any hot  
objects in the vicinity of fuel.  
Always stop the engine and let it cool for  
a few minutes before refuelling.  
•
Never start the machine:  
When refuelling, open the fuel cap slowly  
so that any excess pressure is released  
gently.  
1
If you have spilled fuel or chain oil on the machine.  
Wipe off the spillage and allow remaining fuel to  
evaporate.  
Tighten the fuel cap carefully after  
refuelling.  
2
3
If you have spilled fuel on yourself or your clothes,  
change your clothes.Wash any part of your body that  
has come in contact with fuel. Use soap and water.  
Always move the machine away from the  
refuelling area before starting.  
If the machine is leaking fuel. Check regularly for  
leaks from the fuel cap and fuel lines.  
Clean the area around the fuel cap. Clean the fuel and  
chain oil tanks regularly. The fuel filter must be replaced  
at least once a year. Contamination in the tanks causes  
malfunction. Make sure the fuel is well mixed by shaking  
the container before refuelling.The capacities of the chain  
oil tank and fuel tank are carefully matched.You should  
therefore always fill the chain oil tank and fuel tank at the  
same time.  
WARNING! Never use a machine with  
visible damage to the spark plug guard  
and ignition cable. A risk of sparking  
arises, which can cause a fire.  
!
Transport and storage  
•
Always store the chain saw and fuel so that there is no  
risk of leakages or fumes coming into contact with  
sparks or naked flames from electrical equipment,  
electric motors, relays/switches, boilers and the like.  
•
•
Always store fuel in an approved container designed  
for that purpose.  
For longer periods of storage or for transport of the  
chain saw, the fuel and chain oil tanks should be  
emptied.Ask where you can dispose of waste fuel and  
chain oil at your local gas station.  
WARNING! Fuel and fuel vapor are highly  
flammable.Take care when handling fuel  
and chain oil. Be aware of the risks of  
fire, explosion and those associated with  
inhalation.  
•
•
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
!
The bar guard must always be fitted to the cutting  
attachment when the machine is being transported or  
in storage, in order to prevent accident contact with  
the sharp chain. Even a non-moving chain can cause  
serious cuts to yourself or persons you bump into with  
an exposed chain.  
Fuel safety  
•
Never refuel the machine while the engine is running.  
•
Remove the spark plug cap from the spark plug.  
Activate the chain brake.  
•
Make sure there is plenty of ventilation when refuelling  
or mixing fuel (gasoline and 2-stroke oil).  
Long-term storage  
Empty the fuel/oil tanks in a well ventilated area.Store the  
fuel in approved cans in a safe place. Fit the bar guard.  
Clean the machine. See instructions under the heading  
Maintenance schedule.  
20 – English  
STARTING AND STOPPING  
Pull the starter handle (4): Pull the starter handle with  
Starting and stopping  
your right hand and pull out the starter cord slowly until  
you feel a resistance (as the starter pawls engage) then  
pull firmly and rapidly until the engine fires.  
WARNING! Note the following before  
starting:  
!
Push down the red choke control (5): As soon as the  
engine fires which can be heard through a "puff" sound,  
push down on the red choke control.  
The chain brake must be engaged when  
the chain saw is started to reduce the  
chance of contact with the moving chain  
during starting.  
Pull the starter handle (6): Keep on pulling the cord  
powerfully until the engine starts.  
Never start a chain saw unless the bar,  
chain and all covers are fitted correctly.  
Otherwise the clutch can come loose and  
cause personal injuries.  
Warm engine  
Start position (1):The correct choke/start throttle setting  
for warm starting is obtained by initially moving the choke  
control by pulling the red control outward - upwards.  
Place the machine on firm ground. Make  
sure you have a secure footing and that  
the chain cannot touch anything.  
Decompression valve (2): Press the valve to reduce the  
pressure in the cylinder and make starting easier. Once  
the machine has started the valve will automatically return  
to its original setting.  
Keep people and animals well away from  
the working area.  
Air purge (3): Press the air purge diaphragm repeatedly  
until fuel fills the diaphragm (at least 6 times). The  
diaphragm need not be completely filled.  
Never twist the starter cord around your  
hand.  
Push down the red choke control (5): This inactivates  
the choke, which is not needed when starting a warm  
chain saw.However the movement of the start/stop switch  
will have engaged a high idle, making warm starting  
easier.  
Starting  
The chain brake must be engaged when the chain saw is  
started.Activate the brake by moving the front hand guard  
forwards.  
Pull the starter handle (6): Grip the front handle with  
your left hand. Hold the chain saw on the ground by  
placing your right foot through the rear handle.  
Pull the starter handle with your right hand and pull out the  
starter cord slowly until you feel a resistance (as the  
starter pawls engage) then pull firmly and rapidly until the  
engine fires.  
As the chain brake is still engaged the speed of the engine  
must be set to idling as soon as possible, this is achieved  
by disengaging the throttle lock. Disengagement is done  
by gently touching on the throttle trigger. This prevents  
unnecessary wear to the clutch, clutch drum and brake  
band. Allow the machine to idle a few seconds before  
giving full throttle.  
Cold engine  
Start position (1): Set the start/stop switch in the choke  
position by pulling the red control outward - upward.  
Decompression valve (2): Press the valve to reduce the  
pressure in the cylinder and make starting easier. Once  
the machine has started the valve will automatically return  
to its original setting.  
Air purge (3): Press the air purge diaphragm repeatedly  
until fuel fills the diaphragm (at least 6 times). The  
diaphragm need not be completely filled.  
There is a simplified start reminder with illustrations to  
describe each step on the rear edge of the saw (A).  
Grip the front handle with your left hand. Hold the chain  
saw on the ground by placing your right foot through the  
rear handle.  
English – 21  
STARTING AND STOPPING  
CAUTION! Do not pull the starter cord all the way out and  
•
Observe your surroundings and make sure that there  
do not let go of the starter handle when the cord is fully  
extended. This can damage the machine.  
is no risk of people or animals coming into contact  
with the cutting equipment.  
Note! Reactivate the chain brake by pushing the front  
hand guard back towards the front handle. The chain  
saw is now ready for use.  
•
Always hold the saw with both hands. The right hand  
should be on the rear handle, and the left hand on the  
front handle. All people, whether right or left handed,  
should use this grip. Use a firm grip with thumbs and  
fingers encircling the chain saw handles.  
Reactivate the chain brake by pushing the front hand  
guard back towards the front handle. The chain saw is  
now ready for use.  
WARNING! Long term inhalation of the  
engine’s exhaust fumes, chain oil mist  
and dust from sawdust can represent a  
health risk.  
Stopping  
!
•
Never start a chain saw unless the bar, chain and all  
covers are fitted correctly. See instructions under the  
heading Assembly. Without a bar and chain attached  
to the chain saw the clutch can come loose and cause  
serious injury.  
Stop the engine by pushing the start/stop switch down.  
CAUTION! The start/stop switch automatically returns to  
run position. To avoid involuntary start up, the spark plug  
cap must always be removed from the spark plug when  
the machine is unsupervised.  
•
The chain brake should be activated when starting.  
Se instructions under the heading Start and stop. Do  
not drop start. This method is very dangerous  
because you may lose control of the saw.  
•
Never start the machine indoors. Exhaust fumes can  
be dangerous if inhaled.  
22 – English  
WORKING TECHNIQUES  
Basic safety rules  
Before use:  
1
•
Look around you:  
To ensure that people, animals or other things cannot  
affect your control of the machine.  
•
To make sure that none of the above might come  
within reach of your saw or be injured by falling trees.  
,
1
Check that the chain brake works correctly and is not  
damaged.  
2
3
Check that the rear right hand guard is not damaged.  
Check that the throttle lockout works correctly and is  
not damaged.  
CAUTION! Follow the instructions above, but do not use a  
chain saw in a situation where you cannot call for help in  
case of an accident.  
4
Check that the stop switch works correctly and is not  
damaged.  
2
3
4
Do not use the machine in bad weather, such as  
dense fog, heavy rain, strong wind, intense cold, etc.  
Working in bad weather is tiring and often brings  
added risks, such as icy ground, unpredictable felling  
direction, etc.  
5
6
Check that all handles are free from oil.  
Check that the anti vibration system works and is not  
damaged.  
7
8
9
Check that the muffler is securely attached and not  
damaged.  
Take great care when removing small branches and  
avoid cutting bushes (i.e.cutting many small branches  
at the same time). Small branches can be grabbed by  
the chain and thrown back at you, causing serious  
injury.  
Check that all parts of the chain saw are tightened  
correctly and that they are not damaged or missing.  
Check that the chain catcher is in place and not  
damaged.  
Make sure you can move and stand safely. Check the  
area around you for possible obstacles (roots, rocks,  
branches, ditches, etc.) in case you have to move  
suddenly. Take great care when working on sloping  
ground.  
10 Check the chain tension.  
General working instructions  
IMPORTANT!  
This section describes basic safety rules for using a  
chain saw. This information is never a substitute for  
professional skills and experience. If you get into a  
situation where you feel unsafe, stop and seek expert  
advice. Contact your chain saw dealer, service agent or  
an experienced chain saw user. Do not attempt any task  
that you are not sure you can handle!  
Before using a chain saw you must understand the  
effects of kickback and how to avoid them. See  
instructions under the heading How to avoid kickback.  
5
Take great care when cutting a tree that is under  
tension. A tree that is under tension may spring back  
to its normal position before or after being cut. If you  
position yourself incorrectly or make the cut in the  
wrong place the tree may hit you or the machine and  
cause you to lose control. Both situations can cause  
serious personal injury.  
Before using a chain saw you must understand the  
difference between cutting with the top and bottom  
edges of the bar. See instructions under the headings  
How to avoid kickback and Machine’s safety equipment.  
Wear personal protective equipment. See instructions  
under the heading Personal protective equipment.  
English – 23  
WORKING TECHNIQUES  
Have control over the workpiece. If the pieces you  
intend to cut are small and light, they can jam in the  
saw chain and be thrown towards you. Even if this  
does not need to be a danger, you may be surprised  
and lose control of the saw. Never saw stacked logs or  
branches without first separating them. Only saw one  
log or one piece at a time. Remove the cut pieces to  
keep your working area safe.  
6
Before moving your chain saw switch off the engine  
and lock the chain using the chain brake. Carry the  
chain saw with the bar and chain pointing backwards.  
Fit a guard to the bar before transporting the chain  
saw or carrying it for any distance.  
7
When you put the chain saw on the ground, lock the  
saw chain using the chain brake and ensure you have  
a constant view of the machine. Switch the engine off  
before leaving your chain saw for any length of time.  
4
Never use the chain saw above shoulder height  
and avoid cutting with the tip of the bar. Never use  
the chain saw one-handed!  
General rules  
1
If you understand what kickback is and how it happens  
then you can reduce or eliminate the element of  
surprise. By being prepared you reduce the risk.  
Kickback is usually quite mild, but it can sometimes be  
very sudden and violent.  
2
Always hold the chain saw firmly with your right hand  
on the rear handle and your left hand on the front  
handle. Wrap your fingers and thumbs around the  
handles.You should use this grip whether you are  
right-handed or left-handed. This grip minimizes the  
effect of kickback and lets you keep the chain saw  
under control. Do not let go of the handles!  
5
In order to keep control of your saw, always maintain  
a firm foothold. Never work on a ladder, in a tree or on  
any other insecure support.  
3
Most kickback accidents happen during limbing. Make  
sure you are standing firmly and that there is nothing in  
the way that might make you trip or lose your balance.  
Lack of concentration can lead to kickback if the  
kickback zone of the bar accidentally touches a  
branch, nearby tree or some other object.  
6
7
Always use a fast cutting speed, i.e. full throttle.  
Take great care when you cut with the top edge of the  
bar, i.e. when cutting from the underside of the object.  
This is known as cutting with a pushing chain. The  
chain tries to push the chain saw back towards the  
24 – English  
WORKING TECHNIQUES  
user. If the saw chain is jamming, the saw may be  
pushed back at you.  
Cutting with a pushing chain increases the risk of  
kickback.See instructions under the heading How to avoid  
kickback.  
Terms  
Cutting = General term for cutting through wood.  
Limbing = Cutting branches off a felled tree.  
Splitting = When the object you are cutting breaks off  
before the cut is complete.  
8
Unless the user resists this pushing force there is a  
risk that the chain saw will move so far backwards that  
only the kickback zone of the bar is in contact with the  
tree, which can lead to a kickback.  
There are five important factors you should consider  
before making a cut:  
1
Make sure the cutting equipment will not jam in the  
cut.  
2
3
Make sure the object you are cutting will not split.  
Cutting with the bottom edge of the bar, i.e. from the top  
of the object downwards, is known as cutting with a  
pulling chain. In this case the chain saw pulls itself  
towards the tree and the front edge of the chain saw  
body rests naturally on the trunk when cutting. Cutting  
with a pulling chain gives the operator better control over  
the chain saw and the position of the kickback zone.  
Make sure the chain will not strike the ground or any  
other object during or after cutting.  
4
Is there a risk of kickback?  
9
Follow the instructions on sharpening and maintaining  
your bar and chain. When you replace the bar and  
chain use only combinations that are recommended  
by us. See instructions under the headings Cutting  
equipment and Technical data.  
Basic cutting technique  
5
Do the conditions and surrounding terrain affect how  
safely you can stand and move about?  
WARNING! Never use a chain saw by  
Two factors decide whether the chain will jam or the object  
that you are cutting will split: the first is how the object is  
supported before and after cutting, and the second is  
whether it is in tension.  
holding it with one hand. A chain saw is  
not safely controlled with one hand.  
Always have a secure, firm grip around  
the handles with both hands.  
!
In most cases you can avoid these problems by cutting in  
two stages; from the top and from the bottom.You need to  
support the object so that it will not trap the chain or split  
during cutting.  
General  
•
•
Always use full throttle when cutting!  
Reduce the speed to idle after every cut (running the  
engine for too long at full throttle without any load, i.e.  
without any resistance from the chain during cutting,  
can lead to serious engine damage).  
IMPORTANT! If the chain jams in the cut: stop the  
engine! Don’t try to pull the chain saw free. If you do you  
may be injured by the chain when the chain saw  
suddenly breaks free.Use a lever to open up the cut and  
free the chain saw.  
•
•
Cutting from above = Cutting with a pulling chain.  
Cutting from below = Cutting with pushing chain.  
English – 25  
WORKING TECHNIQUES  
The following instructions describe how to handle the  
Turn the log and finish the cut from the opposite side.  
common situations you are likely to encounter when using  
a chain saw.  
Limbing  
When limbing thick branches you should use the same  
approach as for cutting.  
The log is supported at one end. There is a high risk  
that it will split.  
Cut difficult branches piece by piece.  
2
1
3
Start by cutting from below (about 1/3 of the way through).  
Finish by cutting from above so that the two cuts meet.  
Cutting  
WARNING! Never attempt to cut logs  
while they are in a pile or when a couple  
!
of logs are lying together. Such  
procedures drastically increase the risk  
of kickback which can result in a serious  
or fatal injury.  
The log is supported at both ends. There is a high risk  
that the chain will jam.  
If you have a pile of logs, each log you attempt to cut  
should be removed from the pile, placed on a saw horse  
or runners and cut individually.  
Start by cutting from above (about 1/3 of the way through).  
Finish by cutting from below so that the two cuts meet.  
Remove the cut pieces from the cutting area. By leaving  
them in the cutting area, you increase the risk for  
inadvertently getting a kickback, as well as increasing the  
risk of losing your balance while working.  
Tree felling technique  
IMPORTANT! It takes a lot of experience to fell a tree.  
Inexperienced users of chain saws should not fell trees.  
Do not attempt any task beyond your experience level!  
The log is lying on the ground. There is little risk of the  
chain jamming or the object splitting. However there is a  
risk that the chain will touch the ground when you finish  
the cut.  
Safe distance  
The safe distance between a tree that is to be felled and  
anyone else working nearby is at least 2 1/2 tree lengths.  
Make sure that no-one else is in this ”risk zone” before or  
during felling.  
Cut all the way through the log from above. Avoid letting  
the chain touch the ground as you finish the cut. Maintain  
full throttle but be prepared for what might happen.  
If it is possible (can you turn the log?) stop cutting about  
2/3 of the way through the log.  
26 – English  
WORKING TECHNIQUES  
Felling direction  
Clearing the trunk and preparing your retreat  
The aim is to fell the tree in a position where you can limb  
and cross-cut the log as easily as possible.You want it to  
fall in a location where you can stand and move about  
safely.  
Delimb the stem up to shoulder height. It is safer to work  
from the top down and to have the tree between you and  
the saw.  
Once you have decided which way you want the tree to fall  
you must judge which way the tree would fall naturally.  
Several factors affect this:  
•
•
•
•
•
•
Lean of the tree  
Bend  
Wind direction  
Arrangement of branches  
Weight of snow  
Remove any undergrowth from the base of the tree and  
check the area for obstacles (stones, branches, holes,  
etc.) so that you have a clear path of retreat when the tree  
starts to fall.Your path of retreat should be roughly 135  
degrees away from the intended felling direction.  
Obstacles within the reach of the tree: for example,  
other trees, power lines, roads and buildings.  
•
Look for signs of damage and rot in the stem, this  
makes it more probably that the tree will break and  
start to fall before you expect it to.  
D
a
n
g
e
r z  
o
n
e
Felling direction  
D
Retreat path  
Danger zone  
a
n
g
e
r z  
You may find you are forced to let the tree fall in its natural  
direction because it is impossible or dangerous to try to  
make it fall in the direction you first intended.  
o
n
e
Another very important factor, which does not affect the  
felling direction but does affect your safety, is to make sure  
the tree has no damaged or dead branches that might  
break off and hit you during felling.  
Felling  
WARNING! Unless you have special  
training we advise you not to fell trees  
with a diameter larger than the bar length  
of your saw!  
!
The main point to avoid is letting the tree fall onto another  
tree. It is very dangerous to remove a trapped tree and  
there is high accident risk. See instructions under the  
heading Freeing a tree that has fallen badly.  
Felling is done using three cuts. First you make the  
directional cuts, which consist of the top cut and the  
bottom cut, then you finish with the felling cut. By placing  
these cuts correctly you can control the felling direction  
very accurately.  
Directional cuts  
To make the directional cut you begin with the top cut.Aim  
using to the saw’s felling direction mark (1) toward a goal  
further forward in the terrain, where you would like the tree  
to fall (2). Stand on the right-hand side of the tree, behind  
the saw, and cut with a pull stroke.  
IMPORTANT! During critical felling operations, hearing  
protectors should be lifted immediately when sawing is  
completed so that sounds and warning signals can be  
heard.  
English – 27  
WORKING TECHNIQUES  
Next make the bottom cut so that it finishes exactly at the  
end of the top cut.  
All control over the felling direction is lost if the felling  
hinge is too narrow or non-existent, or if the directional  
cuts and felling cut are badly placed.  
When the felling cut and directional cut are complete the  
tree should start to fall by itself or with the aid of a felling  
wedge or breaking bar.  
The directional cuts should run 1/4 of the diameter  
through the trunk and the angle between the top cut and  
bottom cut should be 45°.  
The line where the two cuts meet is called the directional  
cut line. This line should be perfectly horizontal and at  
right angles (90°) to the chosen felling direction.  
We recommend that you use a bar that is longer than the  
diameter of the tree, so that you can make the felling cut  
and directional cuts with single cutting strokes. See  
instructions under the heading Technical data section to  
find out which lengths of bar are recommended for your  
saw.  
Felling cut  
The felling cut is made from the opposite side of the tree  
and it must be perfectly horizontal. Stand on the left side  
of the tree and cut on the pull stroke.  
Make the felling cut about 1.5-2 inches (3-5 cm) above the  
bottom directional cut.  
There are methods for felling trees with a diameter larger  
than the bar length. However these methods involve a  
much greater risk that the kickback zone of the bar will  
come into contact with the tree.  
Finish the felling cut parallel with the directional cut line so  
that the distance between them is at least 1/10 of the  
trunk diameter.The uncut section of the trunk is called the  
felling hinge.  
The felling hinge controls the direction that the tree falls in.  
28 – English  
WORKING TECHNIQUES  
necessary to reduce the tension and make the tree or  
branch break at the point of maximum tension.  
Freeing a tree that has fallen badly  
Freeing a ”trapped tree”  
It is very dangerous to remove a trapped tree and there is  
high accident risk.  
Never try to fell the tree that is trapped.  
Never cut straight through a tree or branch that is in  
tension!  
Never work in the risk zone of the hanging trapped tree.  
If you must cut across tree/limb, make two to three cuts,  
one inch apart, one to two inches deep.  
Continue to cut deeper until tree/limb bends and tension  
is released.  
The safest method is to use a winch.  
•
Tractor-mounted  
Cut tree/limb from outside the bend, after tension has  
been released.  
•
Portable  
How to avoid kickback  
WARNING! Kickback can happen very  
suddenly and violently; kicking the chain  
!
saw, bar and chain back at the user. If  
this happens when the chain is moving it  
can cause very serious, even fatal  
injuries. It is vital you understand what  
causes kickback and that you can avoid  
it by taking care and using the right  
working technique.  
Cutting trees and branches that are in tension  
Preparations:Work out which side is in tension and where  
the point of maximum tension is (i.e. where it would break  
if it was bent even more).  
What is kickback?  
The word kickback is used to describe the sudden  
reaction that causes the chain saw and bar to jump off an  
object when the upper quadrant of the tip of the bar,  
known as the kickback zone, touches an object.  
Decide which is the safest way to release the tension and  
whether you are able to do it safely. In complicated  
situations the only safe method is to put aside your chain  
saw and use a winch.  
General advice:  
Position yourself so that you will be clear of the tree or  
branch when the tension is released.  
Kickback always occurs in the cutting plane of the bar.  
Normally the chain saw and bar are thrown backwards  
and upwards towards the user. However, the chain saw  
may move in a different direction depending on the way it  
Make one or more cuts at or near the point of maximum  
tension. Make as many cuts of sufficient depth as  
English – 29  
WORKING TECHNIQUES  
was being used when the kickback zone of the bar  
Cutting the trunk into logs  
touched the object.  
See instructions under the heading Basic cutting  
technique.  
Kickback only occurs if the kickback zone of the bar  
touches an object.  
Limbing  
WARNING! A majority of kickback  
accidents occur during limbing. Do not  
!
use the kickback zone of the guide bar.  
Be extremely cautious and avoid  
contacting the log, other limbs or objects  
with the nose of the guide bar. Be  
extremely cautious of limbs under  
tension.They can spring back toward  
you and cause loss of control resulting  
in injury.  
Make sure that you can stand and move about safely.  
Work on the left side of the trunk. Work as close as  
possible to the chain saw for maximum control.If possible,  
let the weight of the chain saw rest on the trunk.  
Keep the trunk between you and the chain saw as you  
move along the trunk.  
30 – English  
MAINTENANCE  
General  
Checking, maintaining and  
servicing chain saw safety  
equipment  
The user must only carry out the maintenance and  
service work described in this manual. More extensive  
work must be carried out by an authorised service  
workshop.  
Note! All servicing and repair work on the machine  
requires special training. This is especially true of the  
machine′s safety equipment.If your machine fails any of  
the checks described below we recommend you to  
contact our servicing dealer.  
Carburetor adjustment  
Your Jonsered product has been designed and  
manufactured to specifications that reduce harmful  
exhaust fumes.  
Function  
Chain brake and front hand guard  
•
•
The carburetor governs the engine’s speed via the  
throttle control. Air and fuel are mixed in the  
carburetor. The air/fuel mixture is adjustable. Correct  
adjustment is essential to get the best performance  
from the machine.  
Checking brake band wear  
Brush off any wood dust, resin and dirt from the chain  
brake and clutch drum. Dirt and wear can impair  
operation of the brake.  
The T-screw regulates the throttle setting at idle  
speed. If the T-screw is turned clockwise this gives a  
higher idle speed; turning it anti-clockwise gives a  
lower idle speed.  
Basic settings and running in  
The basic carburetor settings are adjusted during testing  
at the factory. Fine adjustment should be carried out by a  
skilled technician.  
Rec. idle speed: See the Technical data section.  
Fine adjustment of the idling speed T  
Adjust the idle speed with the T-screw. If it is necessary to  
re-adjust, turn the T-screw clockwise while the engine is  
running, until the chain starts to rotate.Then turn counter-  
clockwise until the chain stops. A correctly adjusted idle  
speed setting occurs when the engine runs smoothly in  
every position. It should also be good margin to the rpm  
when the chain starts to rotate.  
Regularly check that the brake band is at least 0.024 inch  
(0.6 mm) thick at its thinnest point.  
Checking the front hand guard  
Make sure the front hand guard is not damaged and that  
there are no visible defects such as cracks.  
WARNING! Contact your servicing  
dealer, if the idle speed setting cannot be  
adjusted so that the chain stops at idle.  
Do not use the chain saw until it has  
been properly adjusted or repaired.  
!
Correctly adjusted carburetor  
Move the front hand guard forwards and back to make  
sure it moves freely and that it is securely anchored to the  
clutch cover.  
When the carburetor is correctly adjusted the machine  
accelerates without hesitation and the machine 4-cycles  
a little at max. speed. It is also important that the chain  
does not rotate at idle. If the L-jet is set too lean it may  
cause starting difficulties and poor acceleration. If the H-  
jet is set too lean the machine will have less power, poor  
acceleration and could suffer damage to the engine.  
English – 31  
MAINTENANCE  
Checking the inertia brake release  
Apply full throttle and activate the chain brake by tilting  
your left wrist forward onto the front hand guard. Do not  
let go of the front handle. The chain should stop  
immediately.  
With the engine turned off, hold the chain saw over a  
stump or other firm object. Let go of the front handle so  
that the bar drops towards the stump as the chain saw  
rotates around the rear handle.  
Throttle lockout  
•
•
•
•
Make sure the throttle control is locked at the idle  
setting when the throttle lockout is released.  
When the bar hits the stump the brake should be  
applied.  
Press the throttle lockout and make sure it returns to  
its original position when you release it.  
Checking the brake trigger  
Place the chain saw on firm ground and start it.Make sure  
the chain does not touch the ground or any other object.  
See the instructions under the heading Start and stop.  
Check that the throttle control and throttle lockout  
move freely and that the return springs work properly.  
Grasp the chain saw firmly, wrapping your fingers and  
thumbs around the handles.  
Start the chain saw and apply full throttle. Release the  
throttle control and check that the chain stops and  
remains stationary. If the chain rotates when the  
throttle control is in the idle position you should check  
the carburetor idle adjustment.  
32 – English  
MAINTENANCE  
Chain catcher  
Stop switch  
Check that the chain catcher is not damaged and is firmly  
attached to the body of the chain saw.  
Start the engine and make sure the engine stops when  
you move the stop switch to the stop position (push the  
red button downwards).  
Right hand guard  
Muffler  
Check that the right hand guard is not damaged and that  
there are no visible defects, such as cracks.  
Never use a machine that has a faulty muffler.  
Regularly check that the muffler is securely attached to  
the machine.  
Vibration damping system  
Regularly check the vibration damping units for cracks or  
deformation.  
Some mufflers are equipped with a special spark arrestor  
screen. If your machine has this type of muffler, you  
should clean the screen at least once a week.This is best  
done with a wire brush. A blocked screen will cause the  
engine to overheat and may lead to serious damage.  
Make sure the vibration damping units are securely  
attached to the engine unit and handle unit.  
Note! The screen must be replaced if it is damaged. If the  
screen is blocked the machine will overheat and this will  
cause damage to the cylinder and piston. Never use a  
machine with a muffler that is in poor condition. Never  
English – 33  
MAINTENANCE  
use a muffler if the spark arrestor screen is missing  
•
Undo the bolt in the centre of the pulley and remove  
or defective.  
the drive disc (A), drive disc spring (B) and the pulley  
(C). Insert and secure a new starter cord in the starter  
pulley. Wind approx. 3 turns of the starter cord on the  
starter pulley. Fit the starter pulley so that the end of  
the recoil spring (D) hooks into the starter pulley. Now  
assemble the drive disc spring, drive disc and the bolt  
in the centre of the pulley. Carry the starter cord  
through the hole in the starter housing and the starter  
handle. Tie a good knot on the starter cord.  
The muffler is designed to reduce the noise level and to  
direct the exhaust gases away from the operator. The  
exhaust gases are hot and can contain sparks, which may  
cause fire if directed against dry and combustible  
material.  
Starter  
WARNING! When the recoil spring is  
wound up in the starter housing it is  
!
under tension and can, if handled  
carelessly, pop out and cause personal  
injury.  
Tensioning the recoil spring  
•
Hook the starter cord in the notch in the pulley and  
turn the starter pulley about 2 turns clockwise.  
Care must be exercised when replacing  
the return spring or the starter cord.  
Wear protective glasses and protective  
gloves.  
Note! Check that the pulley can be turned an  
additional 1/2 turn when the starter cord is pulled all  
the way out.  
Replacing the starter cord  
•
Loosen the screws that hold the starter against the  
crankcase and remove the starter.  
Stretch the line with the handle. Move your thumb and  
release the line. See the figure below.  
•
Pull out the cord approx. 30 cm (12 inches) and hook  
it into the notch in the rim of the pulley. Release the  
recoil spring by letting the pulley rotate slowly  
backwards.  
2
1
34 – English  
MAINTENANCE  
Replacing the return and drive springs  
Air filter  
Recoil spring (A)  
The air filter must be regularly cleaned to remove dust and  
dirt in order to avoid:  
•
Lift up the starter pulley. See instructions under the  
heading Changing a starter cord. Remember that the  
recoil spring is coiled under tension in the starter  
housing.  
•
•
•
•
•
•
Carburettor malfunctions  
Starting problems  
Loss of engine power  
•
•
Remove the cassette with the recoil spring from the  
starter.  
Unnecessary wear to engine parts  
Excessive fuel consumption.  
Lubricate the recoil spring with light oil. Fit the  
cassette with recoil spring in the starter. Fit the starter  
pulley and tension the recoil spring.  
Remove the air filter after taking off the air filter cover.  
When refitting make sure that the air filter seals tightly  
against the filter holder. Clean the filter by brushing or  
shaking it.  
A
B
Drive disc spring (B)  
•
Undo the bolt in the centre of the pulley and remove  
the drive disc and the drive disc spring.  
The filter can be cleaned more thoroughly by washing it in  
water and detergent.  
•
Replace the drive disc spring and fit the drive disc  
above the spring.  
An air filter that has been in use for a long time cannot be  
cleaned completely. The filter must therefore be replaced  
with a new one at regular intervals. A damaged air filter  
must always be replaced.  
Fitting the starter  
•
To fit the starter, first pull out the starter cord and place  
the starter in position against the crankcase. Then  
slowly release the starter cord so that the pulley  
engages with the pawls.  
A JONSERED chain saw can be equipped with different  
types of air filter according to working conditions, weather,  
season, etc. Contact your dealer for advice.  
•
Fit and tighten the screws that hold the starter.  
English – 35  
MAINTENANCE  
Spark plug  
Needle bearing lubrication  
The clutch drum has a needle bearing on the output shaft.  
This needle bearing must be lubricated regularly.  
The spark plug condition is influenced by:  
•
•
Incorrect carburetor adjustment.  
When lubricating, remove the clutch cover by loosening  
the bar nut. Lay the saw on its side with the clutch drum  
upwards.  
An incorrect fuel mixture (too much or incorrect type of  
oil).  
•
A dirty air filter.  
Lubrication involves engine oil dripping into the centre of  
the clutch drum as it rotates.  
These factors cause deposits on the spark plug  
electrodes, which may result in operating problems and  
starting difficulties.  
If the machine is low on power, difficult to start or runs  
poorly at idle speed: always check the spark plug first  
before taking any further action. If the spark plug is dirty,  
clean it and check that the electrode gap is 0.020 inch (0.5  
mm). The spark plug should be replaced after about a  
month in operation or earlier if necessary.  
Cooling system  
To keep the working temperature as low as possible the  
machine is equipped with a cooling system.  
The cooling system consists of:  
1
2
3
4
5
Air intake on the starter.  
Note! Always use the recommended spark plug type! Use  
of the wrong spark plug can damage the piston/cylinder.  
Check that the spark plug is fitted with a suppressor.  
Air guide plate.  
Fins on the flywheel.  
Cooling fins on the cylinder.  
Cylinder cover (directs cold air over the cylinder).  
Lubricating the bar tip sprocket  
Lubricate the bar tip sprocket each time you refuel. Use  
the special grease gun and a good quality bearing grease.  
Clean the cooling system with a brush once a week, more  
often in demanding conditions. A dirty or blocked cooling  
system results in the machine overheating which causes  
damage to the piston and cylinder.  
Note! The cooling system on a chain saw with catalytic  
converter must be cleaned daily. This is particularly  
important on chain saws with catalytic converters,  
because the higher exhaust temperature requires efficient  
cooling of the engine and the catalytic converter unit.  
36 – English  
MAINTENANCE  
”Turbo Air Cleaning” centrifugal  
cleaning  
Centrifugal cleaning means the following: All air to the  
carburetor passes through the starter. Dirt and dust is  
pushed out by the cooling fan.  
IMPORTANT! In order to maintain operation of the  
centrifugal cleaning system it must be regularly  
maintained. Clean the air intake to the starter, the fins on  
the flywheel, the space around the flywheel, inlet pipe and  
carburetor compartment.  
Winter use  
Running problems can occur when using the machine in  
the cold and snowy conditions caused by:  
•
•
Too low engine temperature.  
Icing of the air filter and carburetor.  
Special measures are therefore often required:  
•
Partly mask the air inlet on the starter to increase the  
working temperature of the engine.  
°
°
Temperature -5 C (23 F) or colder:  
For running the machine in cold weather or powder snow,  
a special cover is available, which is mounted on the  
starter housing. This reduces the intake of cold air and  
prevents large amounts of snow from being sucked in.  
CAUTION! If the special winterising kit has been fitted or any  
measures have been taken to increase the temperature  
these changes must be reversed before the machine is used  
in normal temperature conditions. Otherwise there is a risk  
of overheating, resulting in severe damage to the engine.  
IMPORTANT! Any maintenance other than that described  
in this manual must be carried out by your servicing dealer  
(retailer).  
English – 37  
MAINTENANCE  
Maintenance schedule  
The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the  
Maintenance section.  
Daily maintenance  
Weekly maintenance  
Monthly maintenance  
Check the brake band on the chain  
brake for wear. Replace when less  
than 0.024 inch (0.6 mm) remains at  
the most worn point.  
On chain saws without a catalytic  
converter, check the cooling system  
weekly.  
Clean the outside of the machine.  
Check that the components of the  
throttle control work safely. (Throttle  
lockout and throttle control.)  
Check the starter, starter cord and  
return spring.  
Check the clutch centre, clutch drum  
and clutch spring for wear.  
Clean the chain brake and check that  
it operates safely. Make sure that the Check that the vibration damping  
Clean the spark plug. Check that the  
electrode gap is 0.020 inch (0.5 mm).  
chain catcher is undamaged, and  
replace it if necessary.  
elements are not damaged.  
The bar should be turned daily for  
more even wear. Check the  
lubrication hole in the bar, to be sure it  
is not clogged. Clean the bar groove.  
If the bar has a sprocket tip, this  
should be lubricated.  
Lubricate the clutch drum bearing.  
Clean the outside of the carburetor.  
Check that the bar and chain are  
getting sufficient oil.  
File off any burrs from the edges of  
the bar.  
Check fuel hose for cracks or other  
damage. Change if necessary.  
Check the saw chain with regard to  
visible cracks in the rivets and links,  
whether the saw chain is stiff or  
whether the rivets and links are  
abnormally worn. Replace if  
necessary.  
Clean or replace the spark arrestor  
screen on the muffler.  
Empty the fuel tank and clean the  
inside.  
Sharpen the chain and check its  
tension and condition.Check the drive  
sprocket for excessive wear and  
replace if necessary.  
Empty the oil tank and clean the  
inside.  
Clean the carburetor compartment.  
Clean the air filter. Replace if  
necessary.  
Clean the starter units air intake.  
Check all cables and connections.  
Check that nuts and screws are tight.  
Check that the stop switch works  
correctly.  
Check that there are no fuel leaks  
from the engine, tank or fuel lines.  
On chain saws with a catalytic  
converter, check the cooling system  
daily.  
38 – English  
TECHNICAL DATA  
Technical data  
CS 2245  
CS 2245S  
CS 2250S  
Engine  
Cylinder displacement, cu.in/cm3  
Cylinder bore, inch/mm  
Stroke, inch/mm  
2,79/45,7  
1,65/42  
2,79/45,7  
1,65/42  
3,06/50,2  
1,73/44  
1,30/33  
1,30/33  
1,30/33  
Idle speed, rpm  
2700  
2700  
2700  
Power, kW/hp @ rpm  
Ignition system  
2,1 / 2,8 @ 9000  
2,1 / 2,8 @ 9000  
2,4/3,2 @ 9000  
Manufacturer of ignition system  
Type of ignition system  
Spark plug  
Walbro  
Walbro  
Walbro  
MBU-16  
MBU-16  
MBU-16  
NGK BPMR 7A/  
NGK BPMR 7A/  
NGK BPMR 7A/  
Champion RCJ 7Y  
Champion RCJ 7Y  
Champion RCJ 7Y  
Electrode gap, inch/mm  
Fuel and lubrication system  
Manufacturer of carburetor  
Carburetor type  
0,02/0,5  
0,02/0,5  
0,02/0,5  
Zama  
Zama  
Zama  
EL 37  
EL 37  
EL 37  
Fuel tank capacity, US pint/litre  
Oil pump capacity at 9,000 rpm, ml/min  
Oil tank capacity, US pint/litre  
Type of oil pump  
0,99/0,47  
13  
0,99/0,47  
13  
0,99/0,47  
13  
0,55/0,26  
Not adjustable  
0,55/0,26  
Not adjustable  
0,55/0,26  
Not adjustable  
Weight  
Chain saw without bar or chain, empty tanks, lb/kg 10,8/4,9  
11,2/5,1  
11,2/5,1  
Chain/bar  
Standard bar length, inch/cm  
Recommended bar lengths, inch/cm  
Usable cutting length, inches/cm  
Pitch, inch/mm  
15”/38  
15”/38  
15”/38  
13-18/33-45  
12-17/31-43  
0,325/8,25  
0,050/1,3  
0,058/1,5  
Spur/7  
13-18/33-45  
12-17/31-43  
0,325/8,25  
0,050/1,3  
0,058/1,5  
Spur/7  
13-18/33-45  
12-17/31-43  
0,325/8,25  
0,050/1,3  
0,058/1,5  
Spur/7  
Thickness of drive links, inch/mm  
Drive sprocket type/teeth  
Chain speed at max. power, m/sec  
20,0  
20,0  
20,0  
English – 39  
TECHNICAL DATA  
Recommended original and replacement bar and chain combinations  
Following is a list of recommended cutting equipment for the Jonsered chain saw models CS 2245, CS 2245S and  
CS 2250S. The combinations of power head, bar and chain have been tested and found to be in accordance with the  
kickback and vibration requirements of ANSI B 175.1–2000.  
The guide bar nose radius is determined by either the maximum number of teeth in the nose sprocket or the  
corresponding maximum nose radius of a solid bar.  
The following list is the chain saw manufacturers recommendations. There may be other combinations available, which  
will also achieve kickback reduction.  
As we are listing the maximum guide bar nose radius, you may use a guide bar with smaller nose radius than in our list.  
For guide bars of the same length, all sprocket-nose guide bars of the same pitch and having the same number of  
sprocket teeth may be considered to have equivalent kickback energy. A hard nose bar having the same length and nose  
radius as a sprocket-nose bar may be considered to have equivalent or less kickback energy than the sprocket-nose bar.  
Bar and chain combinations  
Chain saw models Jonsered CS 2245, CS 2245S and CS 2250S met the kickback performance requirements of ANSI  
B 175.1-2000 when tested with the combinations of bars and saw chains listed below. The saw chain Jonsered H30 is  
also classified as a low kickback saw chain since it met the requirements for low kickback saw chain outlined in ANSI B  
175.1-2000. We recommend to use only the listed combinations of bars and chains for chain saw models Jonsered  
CS 2245, CS 2245S and CS 2250S. Other chain saw models may not meet the kickback requirements when equipped  
with the listed bar and chain combinations.  
Bar  
Chain  
Drive link count  
Thickness of drive  
links, inch/mm  
Length, inch  
Pitch, inch  
Max. nose radius  
Type  
13  
15  
16  
18  
13  
15  
16  
18  
20  
16  
18  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
0,325  
10T  
10T  
10T  
10T  
10T  
10T  
10T  
10T  
12T  
10T  
10T  
56  
64  
66  
72  
56  
64  
66  
72  
80  
66  
72  
1,3  
Jonsered H30  
1,5  
1,5  
Jonsered H25  
Total NT 528PS  
Note: For the saw chains above (if available) you are free to choose between 0,050" or 0,058" gauge drive links for the  
corresponding bar, see the table below.  
0,050"/1,3 mm  
0,058"/1,5 mm  
H30  
-
-
NT 520PS  
NT 528PS  
H25  
40 – English  
TECHNICAL DATA  
Saw chain filing and file gauges  
English – 41  
FEDERAL EMISSION CONTROL WARRANTY STATEMENT  
charge to the owner at an approved Jonsered servicing  
dealer. If you have any questions regarding your warranty  
rights and responsibilities, you should contact your nearest  
authorized servicing dealer or call Husqvarna Forest &  
Garden at 1-800-487-5951 or visit  
YOUR WARRANTY RIGHTS AND  
OBLIGATIONS  
The EPA (The US Environmental Protection Agency),  
Environment Canada and Jonsered are pleased to explain  
the emissions control system warranty on your 2009 and  
later small nonroad engine. In U.S. and Canada, new small  
nonroad engines must be designed, built and equipped to  
meet the federal stringent anti-smog standards. Jonsered  
must warrant the emission control system on your small  
nonroad engine for the period of time listed below provided  
there has been no abuse, neglect or improper maintenance  
of your unit.Your emmission control system includes Parts  
such as the carburetor and the ignition system.Where a  
warrantable condition exists, Jonsered will repair your small  
nonroad engine at no cost to you. Expenses covered under  
warranty include diagnosis, parts and labor.  
www.charlotte.usa.jonsered.com.  
WARRANTY PERIOD Any warranted part which is not  
scheduled for replacement as required maintenance, or  
which is scheduled only for regular inspection to the effect  
of “repair or replace as necessary” shall be warranted for 2  
years. Any warranted part which is scheduled for  
replacement as required maintenance shall be warranted  
for the period of time up to the first scheduled replacement  
point for that part.  
DIAGNOSISThe owner shall not be charged for diagnostic  
labor which leads to the determination that a warranted  
part is defective, if the diagnostic work is performed at an  
approved Jonsered servicing dealer.  
CONSEQUENTIAL DAMAGES Jonsered may be liable for  
damages to other engine components caused by the  
failure of a warranted part still under warranty.  
WHAT IS NOT COVERED  
All failures caused by abuse, neglect or improper  
maintenance are not covered.  
′
MANUFACTURER S WARRANTY  
COVERAGE  
The 2009 and later small nonroad engines are warranted  
for two years. If any emission related part on you engine  
(as listed above) is defective, the part will be repaired or  
replaced by Jonsered.  
ADD -ON OR MODIFIED PARTS  
′
OWNER S WARRANTY RESPONSIBILITIES  
The use of add-on or modified parts can be grounds for  
disallowing a warranty claim.Jonsered is not liable to cover  
failures of warranted parts caused by the use of add-on or  
modified parts.  
As the small nonroad engine owner, you are responsible for  
the performance of the required maintenance listed in your  
Operator′s Manual. Jonsered recommends that you retain all  
receipts covering maintenance on your small nonroad  
engine, but Jonsered cannot deny warranty solely for the lack  
of receipts or for your failure to ensure the performance of all  
scheduled maintenance.As the small nonroad engine owner,  
you should, however, be aware that Jonsered may deny you  
warranty coverage if your small nonroad engine or a part of it  
has failed due to abuse, neglect, improper maintenance,  
unapproved modifications or the use of parts not made or  
approved by the original equipment manufacturer.You are  
responsible for presenting your small nonroad engine to a  
Jonsered authorized servicing dealer as soon as a problem  
exists. The warranty repairs should be completed in a  
reasonable amount of time, not to exceed 30 days. If you  
have any questions regarding your warranty rights and  
responsibilities, you should contact your nearest  
HOW TO FILE A CLAIM  
If you have any questions regarding your warranty rights  
and responsibilities, you should contact your nearest  
authorized servicing dealer or call Husqvarna Forest &  
Garden at 1-800-487-5951 or visit  
www.charlotte.usa.jonsered.com.  
WHERE TO GET WARRANTY SERVICE  
Warranty services or repairs shall be provided at all  
Jonsered authorized servicing dealers.  
MAINTENANCE, REPLACEMENT AND  
REPAIR OF EMISSION-RELATED PARTS  
Any Jonsered approved replacement part used in the  
performance of any warranty maintenance or repairs on  
emission-related parts, will be provided without charge to  
the owner if the part is under warranty.  
EMISSION CONTROL WARRANTY PARTS  
LIST  
authorized servicing dealer or call Husqvarna Forest &  
Garden at 1-800-487-5951 or visit  
www.charlotte.usa.jonsered.com.  
WARRANTY COMMENCEMENT DATE  
The warranty period begins on the date small nonroad  
engine is delivered.  
LENGTH OF COVERAGE  
1
2
3
Carburetor and internal parts  
Intake pipe, airfilter holder and carburetor bolts.  
Airfilter and fuelfilter covered up to maintenance  
schedule.  
Jonsered warrants to the initial owner and each  
subsequent purchaser that the engine is free from defects  
in materials and workmanship which cause the failure of a  
warranted part for a period of two years.  
4
5
Spark Plug, covered up to maintenance schedule  
Ignition Module  
MAINTENANCE STATEMENT  
The owner is responsible for the performance of all required  
maintenance, as defined in the operator’s manual.  
WHAT IS COVERED  
REPAIR OR REPLACEMENT OF PARTS Repair or  
replacement of any warranted part will be performed at no  
´®z+S!=¶57¨  
´®z+S!=¶57¨  
42 – English  
AMERICAN STANDARD SAFETY PRECAUTIONS  
Other safety precautions  
Safety precautions for chain saw  
users  
(ANSI B 175.1-2000 Annex C)  
WARNING! Do not operate a chain saw  
with one hand! Serious injury to the  
operator, helpers, bystanders or any  
combination of these persons may result  
from one-handed operation. A chain saw  
is intended for two-handed use.  
!
Kickback safety precautions  
WARNING! Kickback may occur when the  
nose or tip of the guide bar touches an  
object, or when the wood closes in and  
pinches the saw chain in the cut.  
!
Do not operate a chain saw when you are fatigued.  
Use safety footwear; snug-fitting clothing, protective  
gloves, and eye, hearing and head protection devices.  
Tip contact in some cases may cause a  
lightning fast reverse reaction, kicking  
the guide bar up and back towards the  
operator.  
Use caution when handling fuel. Move the chain saw at  
least 10 feet (3 m) from the fueling point before starting  
the engine.  
Do not allow other persons to be near the chain saw when  
starting or cutting with the chain saw. Keep bystanders  
and animals out of the work area.  
Pinching the saw chain along the top of  
the guide bar may push the guide bar  
rapidly back towards the operator.  
Do not start cutting until you have a clear work area,  
secure footing and a planned retreat path from the falling  
tree.  
Either of these reactions may cause you  
to lose control of the saw which could  
result in serious personal injury.  
Keep all parts of your body away from the saw chain when  
the engine is running.  
Do not rely exclusively upon the safety  
devices built into your saw. As a chain  
saw user, you should take several steps  
to keep your cutting jobs free from  
accident or injury.  
Before you start the engine, make sure that the saw chain  
is not contacting anything.  
Carry the chain saw with the engine stopped, the guide  
bar and saw chain to the rear, and the muffler away from  
your body.  
Do not operate a chain saw that is damaged, improperly  
adjusted, or not completely and securely assembled. Be  
sure that the saw chain stops moving when the throttle  
control trigger is released.  
With a basic understanding of kickback, you can reduce  
or eliminate the element of surprise. Sudden surprise  
contributes to accidents.  
Keep a good firm grip on the saw with both hands, the  
right hand on the rear handle, and the left hand on the  
front handle, when the engine is running. Use a firm grip  
with thumbs and fingers encircling the chain saw handles.  
A firm grip will help you reduce kickback and maintain  
control of the saw. Don’t let go.  
Shut off the engine before setting the chain saw down.  
Use extreme caution when cutting small size brush and  
saplings because slender material may catch the saw  
chain and be whipped toward you or pull you off balance.  
When cutting a limb that is under tension be alert for  
springback so that you will not be struck when the tension  
in the wood fibers is released.  
Make sure that the area in which you are cutting is free  
from obstacles. Do not let the nose of the guide bar  
contact a log, branch, or any other obstacle which could  
be hit while you are operating the saw.  
Keep handles dry, clean and free of oil or fuel mixture.  
Operate the chain saw only in well-ventilated areas.  
Do not operate a chain saw in a tree unless you have  
been specifically trained to do so.  
Cut at high engine speeds.  
Do not overreach or cut above shoulder height.  
Do not operate a chain saw above shoulder height.  
Follow manufacturer’s sharpening and maintenance  
instructions for the saw chain.  
All chain saw service, other than the items listed in the  
operator’s/owner’s safety and maintenance instructions,  
should be performed by competent chain saw service  
personnel. (For example, if improper tools are used to  
remove the flywheel or if an improper tool is used to hold  
the flywheel in order to remove the clutch, structural  
damage to the flywheel could occur and subsequently  
cause the flywheel to burst.)  
Only use replacement bars and chains specified by the  
manufacturer or the equivalent.  
When transporting your chain saw, use the appropriate  
guide bar guard.  
Note:This Annex is intended primarily for the consumer or  
occasional user.  
English – 43  
1151383-95  
´®z+SFG¶5^¨  
´®z+SFG¶5^¨  
2009-01-21  

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