Husqvarna Trimmer 325HS99X series User Manual

Operators 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  
 
CONTENTS  
Contents  
Note the following before  
starting:  
KEY TO SYMBOLS  
Symbols  
Please read the operator’s manual carefully.  
CONTENTS  
Contents  
WARNING! Long-term exposure to noise  
can result in permanent hearing  
impairment. So always use approved  
hearing protection.  
Note the following before starting:  
INTRODUCTION  
Dear Customer,  
!
!
5
WHAT IS WHAT?  
What is what?  
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.  
GENERAL SAFETY PRECAUTIONS  
Important  
Personal protective equipment  
Machines safety equipment  
FUEL HANDLING  
Fuel safety  
Fuel  
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  
Fuelling  
!
STARTING AND STOPPING  
Check before starting  
Starting and stopping  
WORKING TECHNIQUES  
General working instructions  
MAINTENANCE  
Carburettor  
contents of this operator’s manual.  
Muffler  
Cooling system  
Spark plug  
Air filter  
Gear housing  
Cleaning and lubrication  
Maintenance schedule  
TECHNICAL DATA  
Technical data  
EC-declaration of conformity  
English 3  
 
   
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 Husqvarna 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 the more than 300 years of beeing, 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. The business concept is to develop, manufacture and market motor driven products for forestry and  
gardening as well as for building and construction industry. Husqvarnas aim is also to be in the front edge according to  
ergonomics, usability, security and environmental protection.That is the reason why we have developed many different  
features to provide our products within these areas.  
We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very  
long time to come. The purchase of one of our products 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 authorised dealers, ask for the  
address of your nearest service workshop.  
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 will sell this machine, make sure that the buyer will get  
the operators manual.  
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  
 
 
WHAT IS WHAT?  
What is what?  
1
2
3
4
5
6
7
8
9
Operators manual  
Grease nipple  
Gear housing  
Blades  
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)  
21 Spark plug cap and spark plug  
10 Fuel tank  
11 Air purge  
English – 5  
 
GENERAL SAFETY PRECAUTIONS  
Important  
Personal protective equipment  
IMPORTANT!  
IMPORTANT!  
The machine is only designed for cutting branches and  
twigs.  
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.  
Never use a machine that has been modified in any way  
from its original specification.  
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.  
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 the machine in extreme weather conditions  
such as severe cold, very hot and/or humid climates.  
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  
Wear hearing protection that provides adequate noise  
reduction.  
All covers and guards must be fitted before starting.  
Ensure that the spark plug cap and ignition lead are  
undamaged to avoid the risk of electric shock.  
WARNING! The ignition system of this  
machine produces an electromagnetic  
!
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.  
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! Running an engine in a  
confined or badly ventilated area can  
result in death due to asphyxiation or  
carbon monoxide poisoning.  
!
GLOVES  
Gloves should be worn when necessary, e.g., when fitting  
cutting attachments.  
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.  
BOOTS  
Wear sturdy, non-slip boots or shoes.  
WARNING! Faulty blades can increase  
the risk of accidents.  
!
6 – English  
 
   
GENERAL SAFETY PRECAUTIONS  
CLOTHING  
the throttle control is automatically locked at the idle  
setting.  
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.  
FIRST AID KIT  
Always have a first aid kit nearby.  
Make sure the throttle control is locked at the idle setting  
when the throttle lockout is released.  
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.  
Press the throttle lockout and make sure it returns to its  
original position when you release it.  
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.  
IMPORTANT!  
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.  
Check that the throttle control and throttle lockout move  
freely and that the return springs work properly.  
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.  
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.  
Throttle lockout  
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  
English 7  
 
 
GENERAL SAFETY PRECAUTIONS  
Regularly check the vibration damping units for cracks or  
deformation. Check that the vibration damping element is  
undamaged and securely attached.  
Stop switch  
Use the stop switch to switch off the engine.  
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.  
Start the engine and make sure the engine stops when  
you move the stop switch to the stop setting.  
Hand guard  
Muffler  
The hand guard prevents hands from coming into contact  
with the moving blades, for example, if the operator loses  
grip on the front handle.  
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.  
Check that the hand guard is fitted correctly.  
Check that the hand guard is undamaged.  
Vibration damping system  
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.  
Your machine is equipped with a vibration damping  
system that is designed to minimize vibration and make  
operation easier.  
The machines vibration damping system reduces the  
transfer of vibration between the engine unit/cutting  
equipment and the machines handle unit. The engine  
body, including the blades, is suspended from the handle  
unit by five springs.  
For mufflers it is very important that you follow the  
instructions on checking, maintaining and servicing your  
machine.  
8 – English  
 
GENERAL SAFETY PRECAUTIONS  
Never use a machine that has a faulty muffler.  
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.  
Regularly check that the muffler is securely attached to  
the machine.  
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.  
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.  
Gear housing  
The gear housing gets hot when the machine has been in  
use. To avoid burning yourself do not touch the gear  
housing.  
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.  
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.  
Remember the risk of fire!  
WARNING! The inside of the muffler  
contain chemicals that may be  
!
carcinogenic. Avoid contact with these  
elements in the event of a damaged  
muffler.  
WARNING! Bear in mind that:  
!
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!  
Blades  
To ensure good cutting results it is important that the  
contact pressure between the blades is correct. The  
English 9  
 
FUEL HANDLING  
Petrol  
Fuel safety  
Never start the machine:  
1
2
If you have spilt fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
CAUTION! Always use a quality petrol/oil mixture at least  
90 octane (RON). If your machine is equipped with a  
catalytic converter (see chapter onTechnical data) always  
use a good quality unleaded petrol/oil mixture. Leaded  
petrol will destroy the catalytic converter.  
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.  
3
If the machine is leaking fuel. Check regularly for  
leaks from the fuel cap and fuel lines.  
Use low-emission petrol, also known as alkylate petrol, 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.  
The lowest octane recommended is 90 (RON). If you  
run the engine on a lower octane grade than 90 so-  
called knocking can occur. This gives rise to a high  
engine temperature, which can result in serious  
engine damage.  
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.  
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
When working at continuous high revs a higher octane  
rating is recommended.  
The transport guard must always be fitted to the  
cutting attachment when the machine is being  
transported or in storage.  
Two-stroke oil  
In order to prevent unintentional starting of the engine,  
the spark plug cap must always be removed during  
long-term storage, if the machine is not under close  
supervision and when performing all service  
measures.  
For best results and performance use HUSQVARNA  
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).  
WARNING!Take care when handling fuel.  
Bear in mind the risk of fire, explosion  
and inhaling fumes.  
Never use oil intended for four-stroke engines.  
!
A poor oil quality and/or too high oil/fuel ratio may  
jeopardise function and decrease the life time of  
catalytic converters.  
Fuel  
Mixing ratio  
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.  
1:50 (2%) with HUSQVARNA two-stroke oil.  
1:33 (3%) with oils class JASO FB or ISO EGB  
formulated for air-cooled, two-stroke engines.  
Two-stroke oil, litre  
Petrol, litre  
2% (1:50)  
0,10  
3% (1:33)  
0,15  
WARNING! Fuel and fuel fumes are  
5
highly inflammable and can cause  
!
10  
15  
20  
0,20  
0,30  
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.  
0,30  
0,45  
0,40  
0,60  
10 – English  
 
   
FUEL HANDLING  
Fuelling  
Mixing  
Always mix the petrol and oil in a clean container  
intended for fuel.  
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.  
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.  
Always use a fuel container with an anti-spill valve.  
If the machine is not used for some time the fuel tank  
should be emptied and cleaned.  
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.  
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.  
English 11  
 
 
STARTING AND STOPPING  
Check before starting  
Starting and stopping  
Inspect the working area. Remove any objects that  
could be thrown out.  
WARNING! The complete clutch cover  
Check the cutting attachment. Never use blades that  
are dull, cracked or damaged.  
and gear housing must be fitted before  
the machine is started, otherwise the  
clutch may 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. 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.  
Check that the machine is in perfect working order.  
Check that all nuts and screws are tight.  
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.  
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.  
Only use the machine for the purpose it was intended  
for.  
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.  
Cold engine  
Primer bulb: Press the air purge repeatedly until fuel  
begins to fill the bulb. The bulb need not be completely  
filled.  
All covers must be correctly fitted and undamaged  
before you start the machine.  
Choke: Set the choke control in the choke position.  
A
12 – English  
 
   
STARTING AND STOPPING  
Warm engine  
Primer bulb: Press the air purge repeatedly until fuel  
begins to fill the bulb. The bulb need not be completely  
filled.  
Starting  
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.  
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  
The engine is switched off by moving the stop switch to  
the stop position.  
CAUTION! The stop switch automatically returns to the  
start position. In order to prevent unintentional starting,  
the spark plug cap must be removed from the spark plug  
when assembling, checking and/or performing  
maintenance.  
English 13  
 
WORKING TECHNIQUES  
Never work from a ladder, stool or any other raised  
position that is not fully secured.  
General working instructions  
IMPORTANT!  
This section takes up the basic safety precautions for  
working with a hedge 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.  
WARNING! The machine can cause  
serious personal injury. Read the safety  
instructions carefully. Learn how to use  
the machine.  
Keep in mind that the operator is responsible for  
accidents or hazards occuring to other people or their  
property.  
!
Safety instructions while working  
WARNING! Cutting tool. Do not touch the  
tool without first switching off the  
engine.  
!
Personal protection  
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.  
Wear personal protective equipment.See instructions  
under the heading Personal protective equipment.  
Use your left hand to control the throttle setting.  
Always wear working clothes and heavy-duty long  
trousers.  
Make sure that your hands and feet do not come near  
the cutting attachment when the engine is running.  
Never wear loose clothing or jewellery.  
When the engine is switched off, keep your hands and  
feet away from the cutting attachment until it has  
stopped completely.  
Make sure your hair does not hang below shoulder  
level.  
Safety instructions regarding the  
surroundings  
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.  
14 – English  
 
 
WORKING TECHNIQUES  
Watch out for stumps of branches that can be thrown  
out during cutting.  
Basic working techniques  
When cutting the sides of a hedge, work from the  
bottom upwards.When cutting horizontally, work from  
right to left.  
Do not cut too close to the ground. Stones and other  
objects can be thrown out.  
Check the working area for foreign objects such as  
electricity cables, insects and animals, etc, or other  
objects that could damage the cutting attachment,  
such as metal items.  
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.  
Store the machine out of reach of children.  
Use only original spare parts for repairs.  
Do not rush the work, but work steadily until all the  
branches have been cut back cleanly.  
English 15  
 
MAINTENANCE  
Basic setting  
Carburettor  
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.  
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.  
CAUTION! If the blades move while the engine is idling  
the T screw should be turned anti-clockwise until they  
stop.  
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.  
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  
!
Function  
stops, contact your dealer/service  
workshop. Do not use the machine until  
it has been correctly adjusted or  
repaired.  
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.  
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.  
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.  
Conditions  
The carburettor has three adjustment controls:  
L = Low speed jet  
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.  
H = High speed jet  
T = Idle adjustment screw  
Carefully turn both jets, L and H, so that they are  
midway between fully screwed in and fully screwed  
out.  
H
L
T
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.  
CAUTION! If the blades move while the engine is idling  
the T screw should be turned anti-clockwise until they  
stop.  
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.  
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.  
16 – English  
 
 
MAINTENANCE  
be too high and cause engine damage. Do not let the  
engine run at full speed for more than 10 seconds.  
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.  
H
L
+ 1/4  
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.  
L
CAUTION! If the blades move while the engine is idling  
the T screw should be turned anti-clockwise until they  
stop.  
Fine adjustment of the idle speedT  
Note that the engine should not be under load when you  
adjust the high speed jet H. 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.  
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 blades must also remain stationary when  
the choke control is in the start throttle position.  
T
H
CAUTION! For optimum adjustment of the carburettor,  
contact a qualified dealer/service workshop that has a  
revolution counter at their disposal.  
Correctly adjusted carburettor  
IMPORTANT! 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.  
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 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.  
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  
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.  
English 17  
 
MAINTENANCE  
CAUTION! Never use a machine with a defective muffler.  
Muffler  
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.  
!
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.  
Remember the risk of fire!  
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.  
Cooling system  
To keep the working temperature as low as possible the  
machine is equipped with a cooling system.  
1
2
3
4
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.  
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.  
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  
Spark plug  
The spark plug condition is influenced by:  
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.  
Incorrect carburettor adjustment.  
An incorrect fuel mixture (too much or incorrect type  
of oil).  
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  
18 – English  
 
     
MAINTENANCE  
before taking any further action. If the spark plug is dirty,  
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.  
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.  
Oiling the air filter  
Always use HUSQVARNA filter oil, art. no. 531 00 92-48.  
The filter oil contains a solvent to make it spread evenly  
through the filter.You should therefore avoid skin contact.  
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. Check that the spark plug is fitted with a  
suppressor.  
Air filter  
The air filter must be regularly cleaned to remove dust  
and dirt in order to avoid:  
Carburettor malfunctions  
Starting problems  
Gear housing  
Loss of engine power  
Unnecessary wear to engine parts.  
Excessive fuel consumption.  
There is a grease nipple and a plug for filling lubricant on  
the gear housing. Use a grease gun to fill with grease.  
This should be done after every 60 working hours. Use  
Husqvarna’s special grease, no. 503 98 96-01.  
Clean the filter every 25 hours, or more regularly if  
conditions are exceptionally dusty.  
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.  
The grease in the bevel gear does not normally need to  
be changed except if repairs are carried out.  
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.  
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.  
English 19  
 
   
MAINTENANCE  
Cleaning and lubrication  
Clean any resin and plant residue from the blades using  
cleaning agent 531 00 75-13 (UL22) before and after  
using the machine.  
Lubricate the blade bars with special grease, part no. 531  
00 75-12 (UL 21) before long periods of storage.  
20 – English  
 
 
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. The user must only carry out the maintenance and service work described in this Operator’s  
Manual. More extensive work must be carried out by an authorised service workshop.  
Daily  
Weekly  
Monthly  
Maintenance  
maintenance 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
X
X
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.  
Check that the blades are undamaged and show no signs of  
cracking or other damage. Replace the blades if necessary.  
X
X
X
Clean the air filter. Replace if necessary.  
Check that the hand guard is not damaged. Replace the guard if  
damaged.  
Check that nuts and screws are tight.  
X
X
X
X
Check that there are no fuel leaks from the engine, tank or fuel lines.  
Check the starter and starter cord.  
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 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 mesh on the muffler (only  
applies to mufflers without a catalytic converter).  
Clean the outside of the carburettor and the space around it.  
Fill the gear housing with grease. This should be carried out  
approximately every 60 working hours.  
Check that the screws that hold the blades together are correctly  
tightened.  
X
X
X
X
X
Clean the fuel tank.  
Check the fuel filter from contamination and the fuel hose from  
cracks or other defects. Replace if necessary.  
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
X
Check and clean the spark arrestor mesh on the muffler (only  
applies to mufflers fitted with a catalytic converter).  
To reduce the fire hazard, clean dirt, leaves and surplus lubricant,  
etc from the muffler and engine.  
English – 21  
 
 
TECHNICAL DATA  
Technical data  
Technical data  
325HS75  
325HS99  
Engine  
Cylinder displacement, cm3  
24,5  
24,5  
Cylinder bore, mm  
34,0  
34,0  
Stroke, mm  
27  
27  
Idle speed, rpm  
2700  
2700  
Recommended max. speed, rpm  
Max. engine output, acc. to ISO 8893  
Catalytic converter muffler  
Speed-regulated ignition system  
Ignition system  
10500-12500  
0,7/9000  
No  
10500-12500  
0,7/9000  
No  
Yes  
Yes  
Manufacturer/type of ignition system  
Walbro MB  
Walbro MB  
Champion RCJ 7Y/  
NGK BPM7A  
Champion RCJ 7Y/  
NGK BPM7A  
Spark plug  
Electrode gap, mm  
0,5  
0,5  
Fuel and lubrication system  
Manufacturer/type of carburettor  
Fuel tank capacity, litre  
Weight  
Zama C1Q  
0,5  
Zama C1Q  
0,5  
Weight without fuel, kg  
Noise emissions  
5,7  
6,0  
(see note 1)  
Sound power level, measured dB(A)  
Sound power level, guaranteed LWA dB(A)  
Sound levels  
107  
109  
109  
109  
(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/ISO  
11806 and ISO 7916, m/s2  
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 (LWA) in conformity with EC directive 2000/14/  
EC.  
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.  
22 – English  
 
 
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 COUNCILS 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. Conformity assessment according  
to Annex V.  
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 7 March, 2008  
Michael Kullberg, Business manager  
English – 23  
 
 
 
 
 
 
1151133-26  
´®z+S-@¶6&¨  
´®z+S-@¶6&¨  
2008-03-11  
 

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