Husqvarna Trimmer 325HS75X User Manual
Operator′s manual  
325HS75  
X-SERIES  
X-SERIES  
325HS99  
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  
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.  
Symbols .......................................................................  
CONTENTS  
2
Contents ......................................................................  
Note the following before starting: ................................  
SAFETY INSTRUCTIONS  
3
3
Long-term exposure to noise can result in permanent hearing  
impairment. So always use approved hearing protection.  
Personal protective equipment .....................................  
Machine′s safety equipment ........................................  
Checking, maintaining and servicing the machine′s  
safety equipment ..........................................................  
4
4
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.  
!
5
7
8
General safety precautions ..........................................  
Safety instructions when using the hedge trimmer ......  
WHAT IS WHAT?  
What is what? .............................................................. 10  
FUEL HANDLING  
WARNING! Incorrect or careless use of a  
hedge trimmer can turn it into a dangerous  
tool that can cause serious or even fatal  
injury. It is extremely important that you read  
and understand the contents of this  
operator’s manual.  
Fuel .............................................................................. 11  
Fuelling ........................................................................ 11  
STARTING AND STOPPING  
!
Check before starting ................................................... 12  
Starting and stopping ................................................... 12  
MAINTENANCE  
Carburettor ................................................................... 14  
Muffler .......................................................................... 15  
Cooling system ............................................................ 16  
Spark plug .................................................................... 16  
Air filter ......................................................................... 16  
Gear housing ............................................................... 17  
Cleaning and lubrication .............................................. 17  
Maintenance schedule ................................................. 17  
TECHNICAL DATA  
Technical data .............................................................. 18  
EC-declaration of conformity (Applies to Europe only) . 19  
English – 3  
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SAFETY INSTRUCTIONS  
FIRST AID KIT  
Personal protective equipment  
Always have a first aid kit nearby.  
IMPORTANT! Whenever you use the hedge trimmer you  
must use personal protective equipment that is approved by  
the authorities. Personal protective equipment does not  
eliminate the risk of injury, but it can reduce the degree of  
injury in the event of an accident. Ask your dealer for help  
when choosing equipment.  
Machine′s safety equipment  
This section describes the machine′s 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.  
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.  
!
GLOVES  
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 service workshop.  
Gloves must be worn when required, for example when fitting,  
inspecting or cleaning cutting attachments.  
WARNING! Never use a machine that has  
faulty safety equipment! Carry out the  
inspection, maintenance and service  
routines listed in this section.  
!
HEARING PROTECTION  
Wear hearing protection that provides adequate noise  
reduction.  
Throttle lock  
The throttle lock 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 lock 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.  
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.Visors must comply with  
standard EN 1731.  
Stop switch  
Use the stop switch to switch off the engine.  
BOOTS  
Wear sturdy, non-slip boots.  
Hand guard  
The hand guard prevents hands from coming into contact with  
the moving blades, for example, if the operator loses grip on  
the front handle.  
CLOTHING  
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.  
4 – English  
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SAFETY INSTRUCTIONS  
Vibration damping system  
WARNING! The inside of muffler contain  
chemicals that may be carcinogenic. Avoid  
contact with these elements in the event of a  
damaged muffler.  
Your machine is equipped with a vibration damping system  
that is designed to minimise vibration and make operation  
easier.  
!
!
The machine′s vibration damping system reduces the transfer  
of vibration between the engine unit/cutting equipment and  
the machine′s handle unit. The engine body, including the  
blades, is suspended from the handle unit by five springs.  
WARNING! Engine exhaust fumes contain  
carbon monoxide, which can cause carbon  
monoxide poisoning. For this reason you  
should not start or run the machine indoors,  
or anywhere that is poorly ventilated.  
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!  
WARNING! Overexposure to vibration can  
lead to circulatory damage or nerve damage  
in people who have impaired circulation.  
!
Checking,maintaining and servicing  
the machine′s safety equipment  
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.  
IMPORTANT! 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 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.  
Muffler  
The muffler is designed to keep noise levels to a minimum  
and to direct exhaust fumes away from the user. A muffler  
fitted with a catalytic converter is also designed to reduce  
harmful exhaust gases.  
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.  
!
WARNING! Always stop the engine before  
doing any work on the cutting 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.  
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 mesh. Check whether the muffler on your  
machine is fitted with this kind of mesh.  
!
Throttle lock  
•
Make sure the throttle control is locked at the idle setting  
when the throttle lock is released.  
For mufflers it is very important that you follow the instructions  
on checking, maintaining and servicing your machine. See  
instructions under the heading Checking, maintaining and  
servicing the machine’s safety equipment.  
WARNING! Mufflers fitted with catalytic  
converters get very hot during use and  
remain so for some time after stopping.This  
•
Press the throttle lock and make sure it returns to its  
original position when you release it.  
!
also applies at idle speed. Contact can result  
in burns to the skin. Remember the risk of  
fire!  
English – 5  
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SAFETY INSTRUCTIONS  
•
•
Check that the throttle control and throttle lock move freely  
and that the return springs work properly.  
Muffler  
See instructions under the heading Start. Start the hedge  
trimmer and apply full throttle. Release the throttle trigger  
and check that the blades stop and remain stationary. If  
the blades move when the throttle trigger is in the idle  
position then the carburettor idle setting must be adjusted.  
See instructions under the heading Maintenance.  
•
•
•
Never use a machine that has a faulty muffler.  
Regularly check that the muffler is securely attached to  
the machine.  
Stop switch  
•
Start the engine and make sure the engine stops when  
you move the stop switch to the stop setting.  
If the muffler on your machine is fitted with a spark  
arrestor mesh this must be cleaned regularly. A blocked  
mesh will cause the engine to overheat and may lead to  
serious damage. Never use a muffler that has a defective  
spark arrestor mesh.  
Hand guard  
Blades  
•
•
Check that the hand guard is fitted correctly.  
Check that the hand guard is undamaged.  
To ensure good cutting results it is important that the contact  
pressure between the blades is correct.The contact pressure  
is adjusted by turning the screws on the underside of the bar  
clockwise as far as they will go. Then turn the screws  
anticlockwise a 1/4 turn.Lock the screws using the locking nut  
on the top of the bar. Check that the screws are loose enough  
to allow the washers under the screw heads to slide sideways.  
Vibration damping system  
•
•
Regularly check the vibration damping units for cracks or  
deformation.  
When the blades are correctly adjusted the play between the  
blades should be 0,2–0,4 mm, measured at the screws. The  
edges of the blades are too hard to be filed. Dull blades  
should be sharpened using a grinder. Replace the blades if  
they are bent or damaged.  
Make sure the vibration damping units are securely  
attached to the engine unit and handle unit.  
6 – English  
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SAFETY INSTRUCTIONS  
•
Observe your surroundings and make sure that there is no  
risk of people or animals coming into contact with the  
cutting equipment.  
Assembly of the catcher (accessory)  
Loosen the nuts on top of the bar. Align the bolts in the holes  
on the catcher and fit the bolts. Adjust the blades' contact  
pressure according to the instructions under the heading  
Blades  
•
Place the machine on the ground, ensure the cutting  
attachment is clear of twigs and stones. Hold the body of  
the machine on the ground using your left hand  
(CAUTION! Not with your foot). Then grip the starter  
handle with your right hand and pull the starter cord.  
Gear housing  
•
The gear housing gets hot when the machine has been in  
use. To avoid burning yourself do not touch the gear  
housing.  
Fuel safety  
•
•
Always use a fuel container with an anti-spill valve.  
Never refuel the machine while the engine is running.  
Always stop the engine and let it cool for a few minutes  
before refuelling.  
General safety precautions  
•
•
Make sure there is plenty of ventilation when refuelling or  
mixing fuel (petrol and 2-stroke oil).  
IMPORTANT! The machine is only designed for cutting  
branches and twigs.  
Move the machine at least 3 m from the refuelling point  
before starting it.  
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.  
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.  
Never use the machine in extreme weather conditions such  
as severe cold, very hot and/or humid climates.  
•
Never start the machine:  
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.  
-
If you have spilt fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
-
If you have spilt 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.  
All covers and guards must be fitted before starting. Make  
sure the spark plug cap and HT lead are not damaged.  
Otherwise you could get an electric shock.  
-
-
If the machine is leaking fuel.Check regularly for leaks  
from the fuel cap and fuel lines.  
Avoid all skin contact with fuel. Fuel is a skin irritant  
and may even cause skin changes.  
WARNING! Faulty blades can increase the  
risk of accidents.  
!
Starting  
•
•
The gear housing and clutch drum must be fitted before  
the machine is started, otherwise the clutch can come  
loose and cause personal injury.  
Never start the machine indoors. Exhaust fumes can be  
dangerous if inhaled.  
English – 7  
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SAFETY INSTRUCTIONS  
Transport and storage  
Safety instructions regarding the  
surroundings  
•
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.  
•
•
Never allow children to use the machine.  
Ensure that no-one comes closer than 15 m while you are  
working.  
•
•
Never allow anyone else to use the machine without first  
ensuring that they have understood the contents of the  
operator’s manual.  
•
•
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 petrol station to find  
out where to dispose of excess fuel.  
Never work from a ladder, stool or any other raised  
position that is not fully secured.  
•
•
The transport guard must always be fitted to the cutting  
attachment when the machine is being transported or in  
storage.  
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
WARNING! Take care when handling fuel.  
Bear in mind the risk of fire, explosion and  
inhaling fumes.  
!
Safety instructions while working  
Safety instructions when using the  
hedge trimmer  
WARNING! The machine can cause serious  
personal injury. Read the safety instructions  
carefully. Learn how to use the machine.  
•
•
Always ensure you have a safe and stable working  
position  
!
Always use both hands to hold the machine. Hold the  
machine in front of your body.  
WARNING! Cutting tool. Do not touch the  
tool without first switching off the engine.  
!
CAUTION! Please read the operator’s manual carefully and  
make sure you understand the instructions before using the  
machine.  
Personal protection  
•
•
Use your left hand to control the throttle setting.  
Make sure that your hands and feet do not come near the  
cutting attachment when the engine is running.  
•
When the engine is switched off, keep your hands and feet  
away from the cutting attachment until it has stopped  
completely.  
•
•
Always wear boots and other equipment described under  
the heading Personal protective equipment.  
Always wear working clothes and heavy-duty long  
trousers.  
•
•
Never wear loose clothing or jewellery.  
•
•
Watch out for stumps of branches that can be thrown out  
during cutting.  
Make sure your hair does not hang below shoulder level.  
Do not cut too close to the ground. Stones and other  
objects can be thrown out.  
8 – English  
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SAFETY INSTRUCTIONS  
•
•
•
Check the working area for foreign objects such as  
Basic working techniques  
electricity cables, insects and animals, etc, or other  
objects that could damage the cutting attachment, such  
as metal items.  
•
When cutting the sides of a hedge, work from the bottom  
upwards.When cutting horizontally, work from right to left.  
If any foreign object is hit or if vibrations occur stop the  
machine immediately. Disconnect the HT lead from the  
spark plug. Check that the machine is not damaged.  
Repair any damage.  
If anything jams in the blades while you are working,  
switch off the engine and wait until it has stopped  
completely before cleaning the blades. Disconnect the HT  
lead from the spark plug.  
Safety instructions after completing work  
•
•
Adjust the throttle setting to suit the load.  
When trimming a hedge the engine should always face  
away from the hedge.  
•
•
The transport guard should always be fitted to the cutting  
attachment when the machine is not in use.  
•
Hold the machine as close to your body as possible to get  
the best balance.  
Make sure the cutting attachment has stopped before  
cleaning, carrying out repairs or an inspection.  
Disconnect the HT lead from the spark plug.  
•
Always wear heavy-duty gloves when repairing the cutting  
attachment.This is extremely sharp and can easily cause  
cuts.  
•
•
Make sure that the tip does not touch the ground.  
Do not rush the work, but work steadily until all the  
branches have been cut back cleanly.  
•
•
Store the machine out of reach of children.  
Use only original spare parts for repairs.  
English – 9  
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WHAT IS WHAT?  
18  
3
19  
2
20  
17  
8
7
5
6
9
10  
11  
12  
4
16  
1
15  
13  
14  
What is what?  
1
2
3
4
5
6
7
8
9
Operator′s manual  
Grease nipple  
Gear housing  
Blades  
11 Air purge  
12 Choke control  
13 Throttle lock  
14 Throttle control  
15 Stop switch  
Hand guard  
Front handle  
Cylinder cover  
Starter handle  
Fuel cap  
16 Air filter cover.  
17 Combination spanner  
18 Allen key  
19 Transport guard  
20 Catcher (accessory)  
10 Fuel tank  
10 – English  
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FUEL HANDLING  
Mixing  
Fuel  
•
Always mix the petrol and oil in a clean container intended  
for fuel.  
CAUTION!The machine is equipped with a two-stroke engine  
and must always been run using a mixture of petrol 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.  
•
Always start by filling half the amount of the petrol to be  
used. Then add the entire amount of oil. Mix (shake) the  
fuel mixture. Add the remaining amount of petrol.  
•
Mix (shake) the fuel mixture thoroughly before filling the  
machine’s fuel tank.  
WARNING! Always ensure there is adequate  
ventilation when handling fuel.  
!
Petrol  
CAUTION! Always use a good quality petrol/oil mixture (at  
least 90 octane). If your machine is equipped with a catalytic  
converter (see chapter on Technical data) always use a good  
quality unleaded petrol/oil mixture. Leaded petrol will destroy  
the catalytic converter and it will no longer serve its purpose.  
•
•
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.  
Use low-emission petrol, also known as alkylate petrol, if it is  
available.  
WARNING! The catalytic converter 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.  
!
•
•
The lowest recommended octane rating is 90. If you run  
the engine on a petrol with a lower octane rating than 90  
this can cause knocking. This leads to an increased  
engine temperature, which can result in serious engine  
damage.  
Fuelling  
When working at continuous high revs a higher octane  
rating is recommended.  
WARNING!Taking the following precautions,  
will lessen the risk of fire:  
!
Two-stroke oil  
Do not smoke or place hot objects near fuel.  
•
For best results and performance use HUSQVARNA two-  
stroke oil, which is specially formulated for our two-stroke  
engines. Mixture 1:50 (2%).  
Always shut off the engine before refuelling.  
Always stop the engine and let it cool for a  
few minutes before refuelling.  
•
If HUSQVARNA two-stroke oil is not available, you may  
use another two-stroke oil of good quality that is intended  
for air cooled engines.Contact your dealer when selecting  
an oil. Mixing ratio 1:33 (3%).  
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.  
•
•
Never use two-stroke oil intended for water-cooled  
outboard engines, sometimes referred to as outboard oil.  
Never use oil intended for four-stroke engines.  
Two-stroke oil, litre  
Petrol, litre  
2% (1:50)  
0,10  
3% (1:33)  
0,15  
5
10  
15  
20  
0,20  
0,30  
0,30  
0,45  
0,40  
0,60  
•
•
Clean the area around the fuel cap. Contamination in the  
tank can cause operating problems.  
Ensure that the fuel is well mixed by shaking the container  
before filling the tank.  
English – 11  
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STARTING AND STOPPING  
Check before starting  
Starting and stopping  
Starting  
•
•
Inspect the working area. Remove any objects that could  
be thrown out.  
Check the cutting attachment. Never use blades that are  
dull, cracked or damaged.  
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 about 3 metres  
from the refuelling position before starting.  
Place the machine on a firm surface.  
•
•
•
Check that the machine is in perfect working order. Check  
that all nuts and screws are tight.  
Remember that the blades may start to move  
when the engine is started. Make sure the  
blades cannot come into contact with any  
object. Make sure that no unauthorised  
persons are in the working area, otherwise  
there is a risk of serious personal injury.  
Make sure the gear housing is lubricated correctly. See  
instructions under the heading Gear housing.  
Check that the cutting attachment always stops when the  
engine is idling.  
•
•
Only use the machine for the purpose it was intended for.  
Cold engine  
Make sure that the handle and safety features are in good  
working order. Never use a machine that lacks a part or  
has been modified outside its specifications.  
Ignition: Set the stop switch to the start position.  
Choke: Set the choke control in the choke position. The  
choke position is also the automatic start throttle position.  
•
All covers must be correctly fitted and undamaged before  
you start the machine.  
A
Air purge: Press the air purge diaphragm repeatedly until  
fuel begins to fill the diaphragm. The diaphragm need not be  
completely filled.  
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STARTING AND STOPPING  
Warm engine  
Stopping  
Ignition: Set the stop switch to the start position.  
The engine is stopped by moving the stop switch to the stop  
position.  
Choke: Set the choke control in the choke position and then  
back to its original position. This only engages the start  
throttle setting without any choke.  
B
Air purge: Press the air purge diaphragm repeatedly until  
fuel begins to fill the diaphragm. The diaphragm need not be  
completely filled.  
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.  
Push the choke control back to its original position as soon  
as the engine fires, and continue trying to start until the  
engine starts. When the engine starts, quickly apply full  
throttle to automatically disengage the start throttle setting.  
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.  
English – 13  
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MAINTENANCE  
CAUTION! If the cutting attachment rotates when the engine  
is idling the idle adjustment screw T should be turned anti-  
clockwise until the cutting attachment stops.  
Carburettor  
Your Husqvarna product has been designed and  
manufactured to specifications that reduce harmful  
emissions. After the engine has used 8-10 tanks of fuel the  
engine will be run-in.To ensure that it continues to run at peak  
performance and to minimise harmful exhaust emissions  
after the running-in period, ask your dealer/service workshop  
(who will have a rev counter at their disposal) to adjust your  
carburettor.  
Rec. idle speed 2700 rpm  
Recommended max. speed: See the Technical data  
section.  
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.  
!
WARNING! The complete clutch cover and  
gear housing must be fitted before the  
machine is started, otherwise the clutch may  
come loose and cause personal injury.  
!
Fine adjustment  
•
When the machine has been ”run-in” the carburettor  
should be finely adjusted. The fine adjustment should be  
carried out by a qualified person. First adjust the L-jet,  
then the idling screw T and then the H-jet.  
Function  
Conditions  
•
The carburettor governs the engine’s speed via the  
throttle control. Air and fuel are mixed in the carburettor.  
The air/fuel mixture is adjustable. Correct adjustment is  
essential to get the best performance from the machine.  
•
Before any adjustments are made, make sure that the air  
filter is clean and the air filter cover is fitted. If you adjust  
the carburettor when the air filter is dirty it will result in a  
leaner mixture when the filter is finally cleaned. This can  
lead to serious engine damage.  
•
•
Adjusting the carburettor means that the engine is  
adapted to local operating conditions, e.g. climate,  
altitude, petrol and the type of 2-stroke oil.  
•
•
•
Carefully turn both jets, L and H, so that they are midway  
between fully screwed in and fully screwed out.  
The carburettor has three adjustment controls:  
L = Low speed jet  
Do not attempt to adjust the L and H jets beyond either  
stop as this could cause damage.  
Now start the machine according to the starting  
instructions and let it warm up for 10 minutes.  
H = High speed jet  
T = Idle adjustment screw  
H
CAUTION! If the cutting attachment rotates when the engine  
is idling the idle adjustment screw T should be turned anti-  
clockwise until the cutting attachment stops.  
T
L
Low speed jet L  
Try to find the highest idle speed by turning the low speed jet  
L clockwise then anti-clockwise.When the highest speed has  
been found, turn the low speed jet L 1/4 turn anti-clockwise.  
L
+ 1/4  
•
•
The L and H-jets are used to adjust the supply of fuel to  
match the rate that air is admitted, which is controlled with  
the throttle. If they are screwed clockwise the air/fuel ratio  
becomes leaner (less fuel) and if they are turned anti-  
clockwise the ratio becomes richer (more fuel). A lean  
mixture gives a higher engine speed and a rich mixture  
gives a lower engine speed.  
L
CAUTION! If the cutting attachment rotates when the engine  
is idling the idle adjustment screw T should be turned anti-  
clockwise until the cutting attachment stops.  
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.  
Fine adjustment of the idle speed T  
Basic setting  
Adjust the idle speed with the idle adjustment screw T, if  
adjustment is necessary. First turn the idle adjustment screw  
T clockwise until the blades start to move. Then turn the idle  
adjustment screw T anticlockwise until the blades stop. The  
idle speed is correctly adjusted when the engine runs  
smoothly in every position. There should also be a clear  
margin to the speed at which the blades start to move.  
•
The basic carburettor settings are adjusted during testing  
at the factory. The basic setting is richer than the optimal  
setting and should be maintained for the first few hours the  
machine is in use. The carburettor should then be finely  
adjusted. Fine adjustment should be carried out by a  
skilled technician.  
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MAINTENANCE  
The blades must also remain stationary when the choke  
control is in the start throttle position.  
the engine is idling or when the choke control is in the start  
position. If the low speed jet L is set too lean it may cause  
starting difficulties and poor acceleration.  
T
If the high speed jet H is set too lean it will result in less power,  
less performance, poor acceleration and/or damage to the  
engine. If both the L and H jets are set too rich it will results in  
acceleration problems or too low a working speed.  
Muffler  
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.  
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.  
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.  
High speed jet H  
The high speed jet H affects the engine power, speed,  
temperature and fuel consumption. If the high speed jet H is  
set too lean (screwed in too far) the engine speed will be too  
high and cause engine damage. Do not let the engine run at  
full speed for more than 10 seconds.  
H
Some mufflers are equipped with a special spark arrestor  
mesh. If your machine has this type of muffler, you should  
clean the mesh at least once a week.This is best done with a  
wire brush.  
Apply full throttle and turn the high speed jet H very slowly  
clockwise until the engine slows down. Then turn the high  
speed jet H very slowly anticlockwise until the engine starts to  
run unevenly. Now turn the high speed jet H slowly clockwise  
a little way until the engine runs smoothly. Note that the  
engine should not be under load when the high speed jet is  
adjusted.  
The high speed jet H is adjusted correctly when the machine  
burbles a little. If the machine races then the setting is too  
lean. If the engine produces a lot of smoke and burbles a lot  
then the setting is too rich.  
On mufflers without a catalytic converter the mesh should be  
cleaned weekly, or replaced if necessary. On mufflers fitted  
with a catalytic converter the mesh should be checked, and if  
necessary cleaned, monthly. If the mesh is damaged it  
should be replaced.  
If the mesh 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 mesh will cause  
the machine to overheat and result in damage to the cylinder  
and piston. See also instructions under the heading  
Maintenance.  
H
CAUTION! Never use a machine with a defective muffler.  
CAUTION! For optimum adjustment of the carburettor,  
contact a qualified dealer/service workshop that has a  
revolution counter at their disposal.  
WARNING! Mufflers fitted with catalytic  
converters get very hot during use and  
remain so for some time after stopping.This  
also applies at idle speed. Contact can result  
in burns to the skin. Remember the risk of  
fire!  
!
Correctly adjusted carburettor  
When the carburettor is correctly adjusted the machine  
accelerates without hesitation and burbles a little at maximum  
speed. It is also important that the blades do not move when  
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MAINTENANCE  
Cooling system  
Air filter  
To keep the working temperature as low as possible the  
machine is equipped with a cooling system.  
The air filter must be regularly cleaned to remove dust and dirt  
in order to avoid:  
1
2
•
•
•
•
•
Carburettor malfunctions  
Starting problems  
3
4
Loss of engine power  
Unnecessary wear to engine parts.  
Excessive fuel consumption.  
Clean the filter every 25 hours, or more regularly if conditions  
are exceptionally dusty.  
The cooling system consists of:  
1
2
3
4
Air intake on the starter.  
Fins on the flywheel.  
Cooling fins on the cylinder.  
Cylinder cover (directs cold air over the cylinder).  
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.  
Cleaning the air filter  
Remove the air filter cover and take out the filter. Wash it  
clean in warm, soapy water. Ensure that the filter is dry before  
refitting it.  
Spark plug  
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.  
If the machine is used in dusty conditions the air filter should  
be soaked in oil.See instructions under the heading Oiling the  
air filter.  
The spark plug condition is influenced by:  
•
•
Incorrect carburettor adjustment.  
An incorrect fuel mixture (too much or incorrect type of  
oil).  
Oiling the air filter  
•
A dirty air filter.  
These factors cause deposits on the spark plug electrodes,  
which may result in operating problems and starting  
difficulties.  
Always use HUSQVARNA filter oil, art. no. 503 47 73-01.The  
filter oil contains a solvent to make it spread evenly through  
the filter.You should therefore avoid skin contact.  
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 0.5 mm. The spark plug should be  
replaced after about a month in operation or earlier if  
necessary.  
Put the filter in a plastic bag and pour the filter oil over it.  
Knead the plastic bag to distribute the oil. Squeeze the  
excess oil out of the filter inside the plastic bag and pour off  
the excess before fitting the filter to the machine. Never use  
common engine oil. This would drain through the filter quite  
quickly and collect in the bottom.  
CAUTION! Always use the recommended spark plug type!  
Use of the wrong spark plug can damage the piston/cylinder.  
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MAINTENANCE  
5
6
Clean the air filter. Replace if necessary.  
Gear housing  
Check that the hand guard is not damaged. Replace the  
guard if damaged.  
7
8
Check that nuts and screws are tight.  
Check that there are no fuel leaks from the engine, tank or  
fuel lines.  
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 20 working hours. Use Husqvarna  
special grease, No. 503 98 96-01.  
Weekly maintenance  
CAUTION! The gear housing must not be filled completely  
with grease. The grease expands as the machine heats up  
during operation. If the gear housing was completely filled  
with grease it could damage the seals and lead to leakage of  
grease.  
1
2
Check the starter and starter cord.  
Check that the vibration damping elements are not  
damaged.  
3
Clean the outside of the spark plug. Remove it and check  
the electrode gap. Adjust the gap to 0.5 mm or replace the  
spark plug. Check that the spark plug is fitted with a  
suppressor.  
The grease in the bevel gear does not normally need to be  
changed except if repairs are carried out.  
Cleaning and lubrication  
4
5
Clean the cooling fins on the flywheel.  
Clean or replace the spark arrestor mesh on the muffler  
(only applies to mufflers without a catalytic converter).  
6
7
Clean the carburettor compartment.  
After you have used the machine clean any resin and plant  
residue from the blades using cleaning agent 531 00 60-75  
(UL22).  
Clean the cooling fins on the cylinder and check that the  
air intake near the starter is not blocked.  
8
9
Fill the gear housing with grease. This should be carried  
out approximately every 20 working hours.  
Always lubricate the blade bars with special grease, part no.  
531 00 60-74 (UL 21) before use.  
Check that the screws that hold the blades together are  
correctly tightened.  
Monthly maintenance  
Maintenance schedule  
Below you will find some general maintenance instructions. If  
you need further information please contact your service  
workshop.  
Daily maintenance  
1
2
Clean the fuel tank.  
Clean the outside of the carburettor and the space around  
it.  
3
4
Clean the fan and the area around it.  
Check the fuel filter and the fuel hose. Replace if  
necessary.  
5
6
Check all cables and connections.  
1
2
Clean the outside of the machine.  
Replace the spark plug. Check that the spark plug is fitted  
with a suppressor.  
Check that the components of the throttle control work  
safely. (Throttle lock and throttle control.)  
7
Check and clean the spark arrestor mesh on the muffler  
(only applies to mufflers fitted with a catalytic converter).  
3
4
Check that the stop switch works correctly.  
Check that the blades do not move when the engine is  
idling or when the choke is in the start throttle position.  
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TECHNICAL DATA  
Technical data  
Technical data  
Engine  
325HS75  
325HS99  
3
Cylinder displacement, cm  
Cylinder bore, mm  
Stroke, mm  
24,5  
24,5  
34  
34  
27  
27  
Idle speed, rpm  
2700  
11000-12600  
0,9/9000  
Yes  
2700  
11000-12600  
0,9/9000  
Yes  
Recommended max. speed, rpm  
Max. engine output, acc. to ISO 8893, kW/ r/min  
Catalytic converter muffler  
Speed-regulated ignition system  
Ignition system  
Yes  
Yes  
WalbroMB/SEM  
AM49  
WalbroMB/SEM  
AM49  
Manufacturer/type of ignition system  
Spark plug  
Champion RCJ 7Y/  
NGK BPM7A  
Champion RCJ 7Y/  
NGK BPM7A  
Electrode gap, mm  
0,5  
0,5  
Fuel and lubrication system  
Manufacturer/type of carburettor  
Fuel tank capacity, litre  
Zama C1Q  
0,5  
Zama C1Q  
0,5  
Weight  
Weight without fuel, cutting attachment and guard, kg  
Noise emissions  
5,5  
5,8  
(see note 1)  
Sound power level, measured dB(A)  
107  
109  
109  
109  
Sound power level, guaranteed L  
Noise levels  
dB(A)  
WA  
(see note 2)  
Equivalent noise pressure level at the operator’s ear,  
measured according to EN/ISO 11806 and ISO 7917,  
dB(A), min./max.:  
96  
97  
Vibration levels  
Vibration levels at handles, measured according to EN/  
2
ISO 11806 and ISO 7916, m/s  
Idle speed, rear/front handles:  
Max. speed, rear/front handles:  
Blades  
2,0/2,9  
1,7/4,2  
2,2/2,5  
2,4/4,0  
Length, mm  
720  
1000  
4695  
Blade speed, cuts/min  
4695  
Note 1: Noise emissions in the environment measured as sound power (L ) in conformity with EC directive 2000/14/EC.  
WA  
Note 2: Equivalent sound pressure level is calculated as the time-weighted energy total for sound pressure levels under various  
working conditions with the following time distribution: 1/2 idling and 1/2 max speed.  
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TECHNICAL DATA  
EC-declaration of conformity (Applies to Europe only)  
Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: +46-36-146500, declare under sole responsibility that the hedge trimmers  
Husqvarna 325HS75 and 325HS99 from 2002’s serial numbers and onwards (the year is clearly stated in plain text on the type  
plate with subsequent serial number), are in conformity with the standards or or other normative documents following the  
provisions in the COUNCIL’S DIRECTIVES:  
of June 22, 1998 ”relating to machinery” 98/37/EC, annex IIA.  
of May 3, 1989 ”relating to electromagnetic compatibility” 89/336/EEC, and applicable supplements.  
of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC.  
For information relating to noise emissions, see the chapter Technical data.The following standards have been applied: EN292-2,  
CISPR 12:1997, EN774  
SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has carried out voluntary type approval for  
Husqvarna AB. The certificates have the numbers: SEC/99/712, 01/094/003 - 325HS75, SEC/99/712, 01/094/004 - 325HS99  
Huskvarna January 3, 2002  
Bo Andréasson, Development manager  
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1140179-26  
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