Husqvarna Trimmer 426LST User Manual

Operator’s manual  
426LST 430LS  
Please read the operator’s manual carefully and make sure you understand the instructions  
before using the machine.  
English  
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CONTENTS  
Contents  
Note the following before  
starting:  
KEY TO SYMBOLS  
Symbols ................................................................  
CONTENTS  
2
Please read the operator’s manual carefully.  
Maintenance, replacement, or repair of the emission  
control devices and system may be performed by any  
nonroad engine repair establishment or individual.  
Contents ...............................................................  
Note the following before starting: ........................  
INTRODUCTION  
3
3
WARNING! Long-term exposure to noise  
can result in permanent hearing  
impairment. So always use approved  
hearing protection.  
Dear customer! .....................................................  
WHAT IS WHAT?  
4
5
!
What is what? .......................................................  
GENERAL SAFETY PRECAUTIONS  
Important ..............................................................  
Personal protective equipment .............................  
Machines safety equipment .................................  
Cutting equipment ................................................  
ASSEMBLY  
6
6
7
9
WARNING! Under no circumstances may  
the design of the machine be modified  
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.  
Fitting the loop handle .......................................... 10  
Assembling the cutting equipment ....................... 10  
Fitting the trimmer guard and trimmer head ......... 10  
FUEL HANDLING  
Your warranty may not cover damage or  
liability caused by the use of non-  
authorized accessories or replacement  
parts.  
Fuel safety ............................................................ 11  
Fuel ...................................................................... 11  
Fueling .................................................................. 12  
STARTING AND STOPPING  
WARNING! A clearing saw, brushcutter  
or trimmer can be dangerous if used  
incorrectly or carelessly, and can cause  
serious or fatal injury to the operator or  
others. It is extremely important that you  
read and understand the contents of this  
operator’s manual.  
Check before starting ........................................... 13  
Starting and stopping ........................................... 13  
WORKING TECHNIQUES  
General working instructions ................................ 15  
MAINTENANCE  
Carburetor ............................................................ 17  
Muffler .................................................................. 17  
Cooling system ..................................................... 17  
Spark plug ............................................................ 17  
Fuel filter ............................................................... 18  
Air filter ................................................................. 18  
Bevel gear ............................................................ 18  
Maintenance schedule ......................................... 19  
TECHNICAL DATA  
The Emissions Compliance Period referred to on the  
Emission Compliance label indicates the number of  
operating hours for which the engine has been shown to  
meet Federal and Californian emissions requirements.  
Technical data ...................................................... 20  
FEDERAL AND CALIFORNIA EMISSIONS  
CONTROL WARRANTY STATEMENT  
YOUR WARRANTY RIGHTS AND OBLIGATIONS 21  
The engine exhaust from this product  
contains chemical known to the State  
of California to cause cancer, birth  
defects or other reproductive harm.  
English 3  
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INTRODUCTION  
Dear customer!  
Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689,  
when the Swedish King Karl XI ordered the construction of a factory on the banks of the Huskvarna River, for production  
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-  
powered plant. During over 300 years of continuous operation, the Husqvarna factory has produced a lot of different  
products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first  
motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working  
today.  
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our  
highest priority. We develop, manufacture and market high quality motor driven products for forestry and gardening as  
well as for building and construction industry.  
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  
operators manual as a valuable document. By following itscontent (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 operators manual, so they will also know how to properly maintain and use it.  
Thank you for using a Husqvarna product.  
Husqvarna AB 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  
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WHAT IS WHAT?  
10  
8
11  
7
16  
15  
6
9
12  
5
14  
13  
3
17  
2
19  
18  
4
1
What is what?  
1
2
3
4
5
6
7
8
9
Trimmer head  
11 Cylinder cover  
12 Starter handle  
13 Fuel tank  
Grease filler cap, bevel gear  
Bevel gear  
Cutting attachment guard  
Shaft  
14 Air purge  
15 Choke control  
16 Air filter cover  
Loop handle  
Stop switch  
17 Combination spanner  
18 Locking pin  
Throttle lockout  
Throttle control  
19 Operator’s manual  
10 Spark plug cap and spark plug  
English – 5  
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GENERAL SAFETY PRECAUTIONS  
Important  
Personal protective equipment  
IMPORTANT!  
IMPORTANT!  
The machine is only designed for trimming grass.  
A clearing saw, brushcutter or trimmer can be  
dangerous if used incorrectly or carelessly, and can  
cause serious or fatal injury to the operator or others. It  
is extremely important that you read and understand the  
contents of this operator’s manual.  
The only accessories you can operate with this engine  
unit are the cutting attachments we recommend in the  
chapter on Technical data.  
Never use the machine if you are tired, if you have drunk  
alcohol, or if you are taking medication that could affect  
your vision, your judgement or your co-ordination.  
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.  
Wear personal protective equipment. See instructions  
under the heading ”Personal protective equipment”.  
Never use a machine that has been modified in any way  
from its original specification.  
WARNING! Listen out for warning signals  
or shouts when you are wearing hearing  
protection. Always remove your hearing  
protection as soon as the engine stops.  
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.  
!
HEARING PROTECTION  
All covers, guards and handles must be fitted before  
starting. Ensure that the spark plug cap and ignition  
lead are undamaged to avoid the risk of electric shock.  
Wear hearing protection that provides adequate noise  
reduction.  
The machine operator must ensure that no people or  
animals come closer than 15 metres while working.  
When several operators are working in the same area  
the safety distance should be at least twice the tree  
height and no less than 15 metres.  
EYE PROTECTION  
Always wear approved eye protection. If you use a visor  
then you must also wear approved protective goggles.  
Approved protective goggles must comply with standard  
ANSI Z87.1 in the USA or EN 166 in EU countries.  
WARNING! This machine produces an  
electromagnetic field during operation.  
This field may under some  
circumstances interfere with active or  
passive medical implants.To reduce the  
risk of serious or fatal injury, we  
recommend persons with medical  
implants to consult their physician and  
the medical implant manufacturer before  
operating this machine.  
!
GLOVES  
Gloves should be worn when necessary, e.g., when fitting  
cutting attachments.  
WARNING! Running an engine in a  
confined or badly ventilated area can  
result in death due to asphyxiation or  
carbon monoxide poisoning.  
!
BOOTS  
Wear sturdy, non-slip boots.  
6 – English  
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GENERAL SAFETY PRECAUTIONS  
CLOTHING  
Throttle lockout  
Wear clothes made of a strong fabric and avoid loose  
clothing that can catch on twigs and branches. Always  
wear heavy, long pants. Do not wear jewellery, shorts  
sandals or go barefoot.Secure hair so it is above shoulder  
level.  
The throttle lockout is designed to prevent accidental  
operation of the throttle control. When you press the lock  
(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 movement is controlled by two  
independent return springs.This arrangement means that  
the throttle control is automatically locked at the idle  
setting.  
FIRST AID KIT  
Always have a first aid kit nearby.  
A
Machines safety equipment  
This section describes the machines safety equipment,  
its purpose, and how checks and maintenance should be  
carried out to ensure that it operates correctly. See the  
”What is what?” section to locate where this equipment is  
positioned on your machine.  
B
Make sure the throttle control is locked at the idle  
setting when the throttle lockout is released.  
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.  
Press the throttle lockout and make sure it returns to  
its original position when you release it.  
Check that the throttle control and throttle lockout  
move freely and that the return springs work properly.  
IMPORTANT!  
See instructions under the heading Start. Start the  
machine and apply full throttle. Release the throttle  
and check that the cutting attachment stops and  
remains at a standstill. If the cutting attachment  
rotates with the throttle in the idle position then the  
carburettor idle setting must be checked. See  
instructions under the heading Maintenance.  
All servicing and repair work on the machine requires  
special training.This is especially true of the machines  
safety equipment. If your machine fails any of the  
checks described below you must contact your service  
agent.When you buy any of our products we guarantee  
the availability of professional repairs and service. If the  
retailer who sells your machine is not a servicing dealer,  
ask him for the address of your nearest service agent.  
Stop switch  
Use the stop switch to switch off the engine.  
WARNING! Never use a machine with  
faulty safety equipment.The machine’s  
!
safety equipment must be checked and  
maintained as described in this section.  
If your machine fails any of these checks  
contact your service agent to get it  
repaired.  
U N  
R
Start the engine and make sure the engine stops when  
you move the stop switch to the stop setting.  
English 7  
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GENERAL SAFETY PRECAUTIONS  
For mufflers it is very important that you follow the  
instructions on checking, maintaining and servicing your  
machine.  
Cutting attachment guard  
Never use a machine that has a faulty muffler.  
Regularly check that the muffler is securely attached to  
the machine.  
This guard is intended to prevent loose objects from being  
thrown towards the operator.The guard also protects the  
operator from accidental contact with the cutting  
attachment.  
If the muffler on your machine is fitted with a spark  
arrestor screen this must be cleaned regularly. A blocked  
screen will cause the engine to overheat and may lead to  
serious damage.  
WARNING! The inside of the muffler  
contain chemicals that may be  
!
carcinogenic. Avoid contact with these  
elements in the event of a damaged  
muffler.  
Check that the guard is undamaged and not cracked.  
Replace the guard if it has been exposed to impact or is  
cracked.  
WARNING! Bear in mind that:  
!
The exhaust fumes from the engine are  
Always use the recommended guard for the cutting  
attachment you are using. See chapter on Technical data.  
hot and may contain sparks which can  
start a fire. Never start the machine  
indoors or near combustible material!  
WARNING! Never use a cutting  
attachment without an approved guard.  
!
See the chapter on Technical data. If an  
incorrect or faulty guard is fitted this can  
cause serious personal injury.  
Muffler  
The muffler is designed to keep noise levels to a minimum  
and to direct exhaust fumes away from the user.  
In countries that have a warm and dry climate there is a  
significant risk of fire.We therefore fit certain mufflers with  
a spark arrestor screen. Check whether the muffler on  
your machine is fitted with this kind of screen.  
8 – English  
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GENERAL SAFETY PRECAUTIONS  
Trimmer head  
Cutting equipment  
This section describes how to choose and maintain your  
cutting equipment in order to:  
IMPORTANT!  
Always ensure the trimmer cord is wound tightly and  
evenly around the drum, otherwise the machine will  
generate harmful vibration.  
Reduce the risk of blade thrust.  
Obtain maximum cutting performance.  
Extend the life of cutting equipment.  
Only use the recommended trimmer heads and  
trimmer cords. These have been tested by the  
manufacturer to suit a particular engine size. This is  
especially important when a fully automatic trimmer  
head is used. Only use the recommended cutting  
attachment. See the chapter on Technical data.  
IMPORTANT!  
Only use cutting attachments with the guards we  
recommend! See the chapter on Technical data.  
Refer to the instructions for the cutting attachment to  
check the correct way to load the cord and the correct  
cord diameter.  
WARNING! Always stop the engine  
before doing any work on the cutting  
!
Smaller machines generally require small trimmer  
heads and vice versa. This is because when clearing  
using a cord the engine must throw out the cord  
radially from the trimmer head and overcome the  
resistance of the grass being cleared.  
attachment.This continues to rotate even  
after the throttle has been released.  
Ensure that the cutting attachment has  
stopped completely and disconnect the  
HT lead from the spark plug before you  
start to work on it.  
The length of the cord is also important. A longer cord  
requires greater engine power than a shorter cord of  
the same diameter.  
WARNING! A faulty cutting attachment  
may increase the risk of accidents.  
Make sure that the cutter on the trimmer guard is  
intact.This is used to cut the cord to the correct length.  
!
To increase the life of the cord it can be soaked in  
water for a couple of days. This will make the line  
tougher so that it lasts longer.  
English 9  
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ASSEMBLY  
Fitting the loop handle  
Fitting the trimmer guard and  
trimmer head  
Position the handle on the shaft. Note that the handle  
must be mounted below the arrow on the shaft.  
Fit the correct trimmer guard (A) for use with the  
trimmer head.  
A
Tighten the two screws.  
Fit the drive disc (B) on the output shaft.  
Slide the spacer into the slot in the loop handle.Fit the  
nut and screw. Tighten.  
Assembling the cutting  
equipment  
WARNING! Never use a cutting  
attachment without an approved guard.  
!
See the chapter on Technical data. If an  
incorrect or faulty guard is fitted this can  
cause serious personal injury.  
Turn the blade shaft until one of the holes in the drive  
disc aligns with the corresponding hole in the gear  
housing.  
Insert the locking pin (C) in the hole to lock the shaft.  
Screw on the trimmer head (D) in the opposite  
direction to the direction of rotation.  
10 – English  
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FUEL HANDLING  
Gasoline  
Fuel safety  
Never start the machine:  
1
2
If you have spilled fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
CAUTION! Always use a quality gasoline/oil mixture with  
an octane rating of at least 87 octane ((RON+MON)/2). If  
your machine is equipped with a catalytic converter (see  
chapter on Technical data) always use a good quality  
unleaded gasoline/oil mixture. Leaded gasoline will  
destroy the catalytic converter.  
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.  
3
If the machine is leaking fuel. Check regularly for  
leaks from the fuel cap and fuel lines.  
Use low-emission gasoline, also known as alkylate  
gasoline, if it is available.  
Transport and storage  
Store and transport the machine and fuel so that there  
is no risk of any leakage or fumes coming into contact  
with sparks or naked flames, for example, from  
electrical machinery, electric motors, electrical relays/  
switches or boilers.  
When storing and transporting fuel always use  
approved containers intended for this purpose.  
When storing the machine for long periods the fuel  
tank must be emptied. Contact your local gas station  
to find out where to dispose of excess fuel.  
This engine is certified to operate on unleaded  
gasoline.  
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.  
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
The transport guard must always be fitted to the  
cutting attachment when the machine is being  
transported or in storage.  
Secure the machine during transport.  
When working at continuous high revs a higher octane  
rating is recommended.  
WARNING!Take care when handling fuel.  
Bear in mind the risk of fire, explosion  
and inhaling fumes.  
Two-stroke oil  
!
For best results and performance use HUSQVARNA  
two-stroke engine oil, which is specially formulated for  
our air-cooled two stroke-engines.  
Fuel  
CAUTION! The machine is equipped with a two-stroke  
engine and must always been run using a mixture of  
gasoline and two-stroke engine 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.  
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.  
Mixing ratio  
1:50 (2%) with HUSQVARNA two-stroke oil.  
Two-stroke oil, litre  
Gasoline, litre  
WARNING! Fuel and fuel fumes are  
highly inflammable and can cause  
serious injury when inhaled or allowed to  
come in contact with the skin. For this  
reason observe caution when handling  
fuel and make sure there is adequate  
ventilation.  
2% (1:50)  
!
5
0,10  
10  
0,20  
15  
0,30  
20  
0,40  
US gallon  
US fl. oz.  
2 1/2  
6 1/2  
12 7/8  
1
2 1/2  
5
English 11  
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FUEL HANDLING  
Fueling  
Mixing  
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.  
WARNING! Taking the following  
precautions, will lessen the risk of fire:  
!
Mix (shake) the fuel mixture thoroughly before filling  
the machine’s fuel tank.  
Do not smoke or place hot objects near  
fuel.  
Always shut off the engine before  
refuelling.  
Always stop the engine and let it cool for  
a few minutes before refuelling.  
When refuelling, open the fuel cap slowly  
so that any excess pressure is released  
gently.  
Tighten the fuel cap carefully after  
refuelling.  
Always move the machine away from the  
refuelling area before starting.  
Do not mix more than one month’s supply of fuel at a  
time.  
Clean the area around the fuel cap. Contamination in  
the tank can cause operating problems.  
If the machine is not used for some time the fuel tank  
should be emptied and cleaned.  
Ensure that the fuel is well mixed by shaking the  
container before filling the tank.  
12 – English  
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STARTING AND STOPPING  
Primer bulb: Press the air purge repeatedly until fuel  
begins to fill the bulb. The bulb need not be completely  
filled.  
Check before starting  
Check that the trimmer head and trimmer guard are  
not damaged or cracked.Replace the trimmer head or  
trimmer guard if they have been exposed to impact or  
are cracked.  
Never use the machine without a guard nor with a  
defective guard.  
All covers must be correctly fitted and undamaged  
before you start the machine.  
Starting and stopping  
Choke: Set the choke control in the choke position.  
WARNING! The complete clutch cover  
and shaft must be fitted before the  
machine is started, otherwise the clutch  
can come loose and cause personal  
injury.  
!
Always move the machine away from the  
refuelling area before starting. Place the  
machine on a flat surface. Ensure the  
cutting attachment cannot come into  
contact with any object.  
Make sure no unauthorised persons are  
in the working area, otherwise there is a  
risk of serious personal injury.The safety  
distance is 15 metres.  
WARNING! When the engine is started  
with the choke in choke position the  
cutting attachment will start to rotate  
immediately.  
Starting  
!
Ignition: Set the stop switch to the start position.  
Hold the body of the machine on the ground using your  
left hand (CAUTION! Not with your foot!). Grip the starter  
handle, slowly pull out the cord with your right hand until  
you feel some resistance (the starter pawls grip), now  
quickly and powerfully pull the cord. Never wrap the  
starter cord around your hand  
Reset the choke when the engine fires, repeat pulling the  
cord until the engine starts.  
English 13  
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STARTING AND STOPPING  
CAUTION! Do not pull the starter cord all the way out and  
do not let go of the starter handle when the cord is fully  
extended. This can damage the machine.  
Stopping  
Stop the engine by switching off the ignition.  
U N  
R
14 – English  
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WORKING TECHNIQUES  
6
Always hold the machine with both hands. Hold the  
machine on the right side of your body.  
General working instructions  
IMPORTANT!  
This section takes up the basic safety precautions for  
working with a trimmer.  
If you encounter a situation where you are uncertain  
how to proceed you should ask an expert. Contact your  
dealer or your service workshop.  
Avoid all usage which you consider to be beyond your  
capability.  
You must understand the difference between forestry  
clearing, grass clearing and grass trimming before use.  
Basic safety rules  
7
8
9
Keep the cutting attachment below waist level.  
The engine must be switched off before moving.  
1
Look around you:  
To ensure that people, animals or other things cannot  
affect your control of the machine.  
Never put the machine down with the engine running  
unless you have it in clear sight.  
To ensure that people, animals, etc., do not come into  
contact with the cutting attachment or loose objects  
that are thrown out by the cutting attachment.  
WARNING! Neither the operator of the  
machine nor anyone else may attempt to  
!
NB! Do not use the machine unless you are able to  
call for help in the event of an accident.  
remove the cut material while the engine  
is running or the cutting equipment is  
rotating, as this can result in serious  
injury.  
2
Inspect the working area. Remove all loose objects,  
such as stones, broken glass, nails, steel wire, string,  
etc. that could be thrown out or become wrapped  
around the cutting attachment.  
Stop the engine and cutting equipment  
before you remove material that has  
wound around the blade shaft as  
otherwise there is a risk of injury.The  
bevel gear can get hot during use and  
may remain so for a while afterwards.You  
could get burnt if you touch it.  
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.  
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.  
WARNING! Watch out for thrown objects.  
Always wear approved eye protection.  
!
Never lean over the cutting attachment  
guard. Stones, rubbish, etc. can be  
thrown up into the eyes causing  
blindness or serious injury.  
Keep unauthorised persons at a  
distance. Children, animals, onlookers  
and helpers should be kept outside the  
safety zone of 15 m. Stop the machine  
immediately if anyone approaches. Never  
swing the machine around without first  
checking behind you to make sure no-  
one is within the safety zone.  
5
Keep a good balance and a firm foothold.  
English 15  
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WORKING TECHNIQUES  
Clearing  
Basic working techniques  
The clearing technique removes all unwanted  
vegetation. Keep the trimmer head just above the  
ground and tilt it. Let the end of the cord strike the  
ground around trees, posts, statues and the like.  
CAUTION! This technique increases the wear on the  
cord.  
Always slow the engine to idle speed after each working  
operation. Long periods at full throttle without any load on  
the engine can lead to serious engine damage.  
WARNING! Sometimes branches or  
grass get caught between the guard and  
cutting attachment. Always stop the  
engine before cleaning.  
!
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.The risk  
increases at low temperatures.  
The cord wears quicker and must be fed forward more  
often when working against stones, brick, concrete,  
metal fences, etc., than when coming into contact with  
trees and wooden fences.  
When trimming and clearing you should use less than  
full throttle so that the cord lasts longer and to reduce  
the wear on the trimmer head.  
Cutting  
• The trimmer is ideal for cutting grass that is difficult to  
Grass trimming with a trimmer head  
reach using a normal lawn mower. Keep the cord  
parallel to the ground when cutting.Avoid pressing the  
trimmer head against the ground as this can ruin the  
lawn and damage the tool.  
Trimming  
Hold the trimmer head just above the ground at an  
angle. It is the end of the cord that does the work. Let  
the cord work at its own pace. Never press the cord  
into the area to be cut.  
Do not allow the trimmer head to constantly come into  
contact with the ground during normal cutting.  
Constant contact of this type can cause damage and  
wear to the trimmer head.  
Sweeping  
• The fan effect of the rotating cord can be used for  
The cord can easily remove grass and weeds up  
against walls, fences, trees and borders, however it  
can also damage sensitive bark on trees and bushes,  
and damage fence posts.  
quick and easy clearing up. Hold the cord parallel to  
and above the area to be swept and move the tool to  
and fro.  
Reduce the risk of damaging plants by shortening the  
cord to 10-12 cm and reducing the engine speed.  
When cutting and sweeping you should use full  
throttle to obtain the best results.  
16 – English  
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MAINTENANCE  
On mufflers without a catalytic converter the screen  
Carburetor  
should be cleaned weekly, or replaced if necessary. On  
mufflers fitted with a catalytic converter the screen should  
be checked, and if necessary cleaned, monthly. If the  
screen is damaged it should be replaced. If the screen  
is frequently blocked, this can be a sign that the  
performance of the catalytic converter is impaired.  
Contact your dealer to inspect the muffler. A blocked  
screen will cause the machine to overheat and result in  
damage to the cylinder and piston.  
Adjustment of the idle speed  
Check that the air filter is clean. When the idle speed is  
correct, the cutting attachment should not rotate. If  
adjustment is required, close (turn clockwise) the idle  
adjustment screw T, with the engine running, until the  
cutting attachment starts to rotate. Open (turn  
anticlockwise) the screw until the cutting attachment  
stops. The idle speed is correctly set when the engine  
runs smoothly in all positions, and there is a clear margin  
to the speed at which the cutting attachment starts to  
rotate.  
CAUTION! Never use a machine with a defective muffler.  
Cooling system  
To keep the working temperature as low as possible the  
machine is equipped with a cooling system.  
1
T
WARNING! If the idle speed cannot be  
adjusted so that the cutting attachment  
!
stops, contact your dealer/service  
workshop. Do not use the machine until  
it has been correctly adjusted or  
repaired.  
2
The cooling system consists of:  
1
2
Cooling fins on the cylinder.  
Cooling air intake  
Muffler  
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.  
CAUTION! Some mufflers are fitted with a catalytic  
converter. See chapter on Technical data to see whether  
your machine is fitted with a catalytic converter.  
Spark plug  
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.  
The spark plug condition is influenced by:  
Incorrect carburetor adjustment.  
An incorrect fuel mixture (too much or incorrect type  
of oil).  
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 dirty air filter.  
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 0,6-0,7 mm  
(426LST) / 0,9-1,0 mm (430LS).The spark plug should be  
English 17  
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MAINTENANCE  
replaced after about a month in operation or earlier if  
necessary.  
Excessive fuel consumption.  
0,6 - 0,7 mm (426 LST)  
0,9 - 1,0 mm (430 LS)  
Clean the filter every 25 hours, or more regularly if  
conditions are exceptionally dusty.  
CAUTION! 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.  
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.  
Fuel filter  
Bevel gear  
When the engine runs short of fuel supply, check the fuel  
cap and the fuel filter for blockage.  
There is a grease nipple on the gearbox. Use a grease  
gun to top up with grease.This should be carried out after  
approximately every 25 working hours. Use Husqvarna  
special grease.  
Remove the drive disc or the side bolt in the gear cae  
before installing new grease to arrange for old grease to  
exit.  
Air filter  
CAUTION! When removing and installing the drive disc,  
use care not to allow any dirt and dust entering into the  
gear case.  
The air filter must be regularly cleaned to remove dust  
and dirt in order to avoid:  
CAUTION! Use only HUSQVARNA replacement parts.  
Use of other brands of replacement parts can cause  
damage to your unit or injury to the operator or others.  
Your warranty does not cover damage or liability caused  
by the use of accessories and/or attachments not  
specifically recommended by HUSQVARNA.  
Carburettor malfunctions  
Starting problems  
Loss of engine power  
Unnecessary wear to engine parts  
18 – English  
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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  
Maintenance  
Clean the outside of the machine.  
X
Make sure the throttle trigger lock and the throttle function  
correctly from a safety point of view.  
X
Check that the stop switch works correctly.  
Check that the cutting attachment does not rotate at idle.  
Clean the air filter. Replace if necessary.  
X
X
X
Check that the guard is undamaged and not cracked. Replace  
the guard if it has been exposed to impact or is cracked.  
X
Check that the trimmer head is undamaged and not cracked.  
Replace the trimmer head if necessary.  
X
X
X
Check that nuts and screws are tight.  
Check that there are no fuel leaks from the engine, tank or fuel  
lines.  
Check the starter and starter cord.  
X
X
Check that the vibration damping elements are not damaged.  
Clean the outside of the spark plug. Remove it and check the  
electrode gap. Adjust the gap to 0.5 mm (.20”), or replace the  
spark plug. Check that the spark plug is fitted with a suppressor.  
X
Clean the machine’s cooling system.  
X
X
X
X
Clean or replace the spark arrestor screen on the muffler (only  
applies to mufflers without a catalytic converter).  
Clean the outside of the carburettor and the space around it.  
Check that the bevel gear is filled three-quarters full with  
lubricant. Fill if necessary using special grease.  
Check the fuel filter from contamination and the fuel hose from  
cracks or other defects. Replace if necessary.  
X
X
X
Check all cables and connections.  
Check the clutch, clutch springs and the clutch drum for wear.  
Replace if necessary by an autorized service workshop.  
Replace the spark plug. Check that the spark plug is fitted with a  
suppressor.  
X
X
Check and clean the spark arrestor screen on the muffler (only  
applies to mufflers fitted with a catalytic converter).  
English – 19  
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TECHNICAL DATA  
Technical data  
426LST  
430LS  
Motor  
Cylinder displacement, cu.in/cm3  
Cylinder bore, inch/mm  
Stroke, inch/mm  
1,55/25,4  
1,34/34  
1,10/28  
3000  
1,80/29,5  
1,50/38  
1,03/26  
3000  
Idle speed, rpm  
Recommended max. speed, rpm  
Speed of output shaft, rpm  
11500  
5500  
10000  
6850  
Max. engine output, acc. to ISO 8893, kW/ rpm  
Catalytic converter muffler  
Speed-regulated ignition system  
Ignition system  
0,87/7500  
No  
1,03/8500  
No  
No  
No  
Spark plug  
NGK CMR7H  
NGK CMR7H  
Electrode gap, inch/mm  
Fuel and lubrication system  
Fuel tank capacity, US pint/litre  
Weight  
0,024-0,028/0,6-0,7 0,035-0,039/0,9-1,0  
1,37/0,65  
1,52/0,72  
13,2/6,0  
Weight without fuel, cutting attachment and guard, Lbs/kg 12,6/5,7  
Approved accessories  
Type  
Cutting attachment guard, Art. no.  
Arbor shaft thread M10  
T25  
575 38 41-01  
575 38 41-01  
575 38 41-01  
Trimmer head  
S35  
T35, T35x  
20 – English  
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FEDERAL AND CALIFORNIA EMISSIONS CONTROLWARRANTY STATEMENT  
WARRANTY COMMENCEMENT DATE  
YOUR WARRANTY RIGHTS AND  
OBLIGATIONS  
The warranty period begins on the date the engine or  
equipment is delivered to an ultimate purchaser.  
The EPA (U.S. Environmental Protection Agency), CARB  
LENGTH OF COVERAGE  
(California Air Resources Board), Environment Canada  
and Husqvarna Forest & Garden are pleased to explain  
the emissions control system’s warranty on your 2009 and  
later small off-road engine. In U.S. and Canada, new  
equipment that use small off-road engines must be  
designed, built, and equipped to meet the applicable  
Federal or Californian stringent anti-smog standards.  
Husqvarna Forest & Garden must warrant the emissions  
control system on your small off-road engine for the  
period listed below provided there has been no abuse,  
neglect or improper maintenance of your equipment.Your  
emissions control system may include parts such as the  
carburetor, ignition system, catalytic converter, fuel tank,  
filters and other associated components. Also, included  
may be hoses, belts, connectors, sensors, and other  
emission-related assemblies. Where a warrantable  
condition exists, Husqvarna Forest & Garden will repair  
your small off-road engine at no cost to you including  
diagnosis, parts and labor.  
Husqvarna Forest & Garden warrants to the ultimate  
purchaser and each subsequent owner that the engine or  
equipment is designed, built, and equipped so as to  
conform with all applicable regulations adopted by EPA  
and CARB, and is free from defects in materials and  
workmanship that causes the failure of a warranted part  
for a period of two years.  
WHAT IS COVERED  
REPAIR OR REPLACEMENT OF PARTS Repair or  
replacement of any warranted part under the warranty  
must be performed at no charge to the owner at a  
warranty station. Warranty services or repairs will be  
provided at all Husqvarna Forest & Garden distribution  
centers that are franchised to service the subject engines.  
Throughout the emissions warranty period of two years,  
Husqvarna Forest & Garden must maintain a supply of  
warranted parts sufficient to meet the expected demand  
for such parts.  
MANUFACTURERS WARRANTY  
COVERAGE  
WARRANTY PERIOD Any warranted part that is  
scheduled for replacement as required in the  
The emissions control system is warranted for two years.  
If any emissions-related part on your equipment is  
defective, the part will be repaired or replaced by  
Husqvarna Forest & Garden.  
maintenance schedule, is warranted for the period of time  
prior to the first scheduled replacement point for that part.  
If the part fails prior to the first scheduled replacement,  
the part will be repaired or replaced by Husqvarna Forest  
& Garden at no cost. Any such part repaired or replaced  
under warranty is warranted for the remainder of the  
period prior to the first scheduled replacement point for  
the part. Any warranted part that is not scheduled for  
replacement as required in the maintenance schedule, is  
warranted for two years. If any such part fails during the  
period of warranty coverage, it will be repaired and  
replaced by Husqvarna Forest & Garden at no cost. Any  
such part repaired or replaced under the warranty is  
warranted for the remaining warranty period. Any  
warranted part that is scheduled only for regular  
inspection in the maintenance schedule will be warranted  
for a period of two years. A statement in such written  
instructions to the effect of ”repair or replace as  
necessary” will not reduce the period of warranty  
coverage. Any such part repaired or replaced under  
warranty will be warranted for the remaining warranty  
period.  
OWNERS WARRANTY  
RESPONSIBILITIES  
As the small off-road engine owner, you are  
responsible for performance of the required  
maintenance listed in your operator’s manual.  
Husqvarna Forest & Garden recommends that you  
retain all receipts covering maintenance on your small  
off-road engine, but Husqvarna Forest & Garden  
cannot deny warranty solely for the lack of receipts or  
your failure to ensure the performance of all  
scheduled maintenance.  
As the small off-road engine owner, you should  
however be aware that Husqvarna Forest & Garden  
may deny you warranty coverage if your small off-road  
engine or a part has failed due to abuse, neglect, or  
improper maintenance or unapproved modifications.  
You are responsible for presenting your small off-road  
engine to a Husqvarna Forest & Garden distribution  
center or service center as soon as the 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  
coverage, you should contact Husqvarna Forest &  
Garden at 1-800-487-5951 or visit  
DIAGNOSIS The owner must not be charged for  
diagnostic labor that leads to the determination that a  
warranted part is in fact defective, provided that such  
diagnostic work is performed at a warranty station.  
CONSEQUENTIAL DAMAGES Husqvarna Forest &  
Garden is liable for damages to other engine components  
proximately caused by a failure under warranty of any  
warranted part.  
English – 21  
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FEDERAL AND CALIFORNIA EMISSIONS CONTROLWARRANTY STATEMENT  
EMISSION WARRANTY PARTS LIST  
1
2
3
Carburetor and internal parts  
Intake pipe, airfilter holder and carburetor bolts.  
Airfilter and fuelfilter covered up to maintenance  
schedule.  
4
5
6
Spark Plug, covered up to maintenance schedule  
Ignition Module  
Fuel tank  
WHAT IS NOT COVERED  
All failures caused by abuse, neglect or improper  
maintenance are not covered.  
ADD -ON OR MODIFIED PARTS  
Add-on or modified parts that are not exempted by CARB  
or EPA may not be used. The use of any non-exempted  
add-on or modified parts will be grounds for disallowing a  
warranty claim. Husqvarna Forest & Garden will not be  
liable to warrant failures of warranted parts caused by the  
use of a non-exempted add-on or modified part.  
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  
WHERE TO GET WARRANTY SERVICE  
Warranty services or repairs are provided through all  
Husqvarna Forest & Garden authorized servicing dealers.  
MAINTENANCE, REPLACEMENT AND  
REPAIR OF EMISSION-RELATED PARTS  
Any replacement part may be used in the performance of  
any warranty maintenance or repairs and must be  
provided without charge to the owner. Such use will not  
reduce the warranty obligations of the manufacturer.  
MAINTENANCE STATEMENT  
The owner is responsible for the performance of all  
required maintenance, as defined in the operator’s  
manual.  
22 – English  
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T25  
1
2
3
6,0 m  
18'  
10 cm  
4"  
3,05 m  
9'  
4
5
7
6
8
"Clic"  
15 cm  
6"  
9
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S35  
1
2
3
8,5 m  
28'  
10 cm  
4"  
4,2 m  
14'  
4
5
7
6
8
"Clic"  
10  
11  
15 cm  
6"  
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S35  
1
2
4,25 m  
14'  
4,25 m  
14'  
4
3
5
15 cm  
6"  
B
A
15 cm  
6"  
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T35, T35x  
1
2
3
8,5 m  
28'  
10 cm  
4"  
4,3 m  
14'  
4
5
7
6
8
"Clic"  
15 cm  
6"  
9
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1153174-95  
´®z+U1Q¶59¨  
´®z+U1Q¶59¨  
2009-11-30  
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