Husqvarna Trimmer 326HDA User Manual
Operator’s manual (EPA)  
326HDA  
326HE3  
326HE4  
X-series  
X-series  
X-series  
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 .....................................  
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.  
Machine′s safety equipment ........................................  
Checking, maintaining and servicing the machine′s  
safety equipment ..........................................................  
!
6
8
9
9
General safety precautions ..........................................  
Fuel safety ...................................................................  
Safety instructions when using the hedge trimmer ......  
WHAT IS WHAT?  
Your warranty may not cover damage or  
liability caused by the use of non-authorized  
accessories or replacement parts.  
What is what? .............................................................. 12  
ASSEMBLY  
Fitting the hand guard and loop handle ....................... 13  
Fitting the handle ......................................................... 13  
Fitting the cutting head ................................................ 13  
Adjusting the harness .................................................. 13  
Fitting the impact guard ............................................... 13  
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 .............................................................................. 14  
Fuelling ........................................................................ 15  
STARTING AND STOPPING  
Check before starting ................................................... 16  
Starting and stopping ................................................... 16  
MAINTENANCE  
Carburettor ................................................................... 18  
Muffler .......................................................................... 19  
Cooling system ............................................................ 20  
Spark plug .................................................................... 20  
Air filter ......................................................................... 20  
Gear housing ............................................................... 21  
Cleaning and lubrication .............................................. 21  
Maintenance schedule ................................................. 21  
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  
emissions requirements. Category C = 50 hours, B = 125  
hours, and A = 300 hours.  
Technical data .............................................................. 22  
FEDERAL EMISSION CONTROL WARRANTY  
STATEMENT  
YOUR WARRANTY RIGHTS AND OBLIGATIONS ..... 23  
For customer assistance call: 704-921-7000 or contact us at  
our website: www.husqvarna.com  
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SAFETY INSTRUCTIONS  
FIRST AID KIT  
Personal protective equipment  
Always have a first aid kit nearby.  
IMPORTANT INFORMATION  
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.  
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! Remove your hearing protection  
as soon as you stop the engine, so that you  
can hear any noises or warning signals.  
WARNING! Never use a machine that has  
faulty safety equipment! Carry out the  
inspection, maintenance and service  
routines listed in this section.  
!
!
GLOVES  
Gloves must be worn when required, for example when fitting,  
inspecting or cleaning cutting attachments.  
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.  
HEARING PROTECTION  
A
Wear hearing protection that provides adequate noise  
reduction.  
EYE PROTECTION  
Blows from branches or objects thrown by the moving blades  
can damage the eyes.  
B
Stop switch  
Use the stop switch to switch off the engine.  
BOOTS  
Wear sturdy, non-slip boots.  
Hand guard  
(326HDA55/326HE3)  
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  
For mufflers it is very important that you follow the instructions  
Vibration damping system  
on checking, maintaining and servicing your machine. See  
instructions under the heading Checking, maintaining and  
servicing the machine’s safety equipment.  
Your machine is equipped with a vibration damping system  
that is designed to minimise vibration and make operation  
easier.  
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!  
!
The machine′s vibration damping system reduces the transfer  
of vibration between the engine unit/cutting equipment and  
the machine′s handle unit.  
WARNING! The inside of muffler contain  
chemicals that may be carcinogenic. Avoid  
contact with these elements in the event of a  
damaged muffler.  
!
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.  
!
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.  
These 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 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!  
!
Cutter guard  
(326HDA55)  
The blade guard (A) is intended to protect against any part of  
the body coming into contact with the blades (B).  
Muffler  
A
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.  
B
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.  
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SAFETY INSTRUCTIONS  
•
See instructions under the heading Start. Start the  
Checking,maintaining and servicing  
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.  
′
the machine s safety equipment  
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.  
Throttle lock  
•
Make sure the throttle control is locked at the idle setting  
when the throttle lock is released.  
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.  
!
•
Press the throttle lock and make sure it returns to its  
original position when you release it.  
Stop switch  
•
Start the engine and make sure the engine stops when  
you move the stop switch to the stop setting.  
•
Check that the throttle control and throttle lock move freely  
and that the return springs work properly.  
Hand guard  
(326HDA55/326HE3)  
•
Check that the hand guard is fitted correctly.  
•
Check that the hand guard is undamaged.  
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SAFETY INSTRUCTIONS  
Vibration damping system  
Blades  
•
Regularly check the vibration damping units for cracks or  
•
To ensure good cutting results it is important that the  
deformation.  
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.  
•
Check that the vibration damping element is undamaged  
and securely attached.  
•
When the blades are correctly adjusted the play between  
the blades should be 0,2–0,4 mm, measured at the  
screws.  
Muffler  
•
Never use a machine that has a faulty muffler.  
•
The edges of the blades are too hard to be filed. Dull  
blades should be sharpened using a grinder.  
•
Regularly check that the muffler is securely attached to  
the machine.  
If the muffler on your machine is fitted with a spark arrestor  
mesh then it should be cleaned regularly. A blocked mesh  
causes the engine to overheat, which can lead to serious  
damage.  
•
Replace the blades if they are bent or damaged.  
Never use a muffler with a defective spark arrestor mesh.  
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SAFETY INSTRUCTIONS  
Cutter guard  
General safety precautions  
(326HDA55)  
IMPORTANT!  
The machine is only designed for cutting branches and  
twigs.  
•
•
Check that the blade guard is not damaged or distorted.  
Replace the blade guard if it is bent or damaged.  
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.  
A
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 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.  
B
Gear housing  
•
The gear housing gets hot when the machine has been in  
use. To avoid burning yourself do not touch the gear  
housing.  
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.  
WARNING! Faulty blades can increase the  
risk of accidents.  
!
Starting  
•
The complete clutch cover and shaft 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.  
Observe your surroundings and make sure that there is no  
risk of people or animals coming into contact with the  
cutting equipment.  
•
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.  
8 – English  
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SAFETY INSTRUCTIONS  
Fuel safety  
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 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.  
WARNING! Cutting tool. Do not touch the  
tool without first switching off the engine.  
•
•
Make sure there is plenty of ventilation when refuelling or  
mixing fuel (gasoline and 2-stroke oil).  
Move the machine at least 3 m from the refuelling point  
before starting it.  
CAUTION! Please read the operator’s manual carefully and  
make sure you understand the instructions before using the  
machine.  
Personal protection  
•
Always wear boots and other equipment described under  
the heading Personal protective equipment.  
•
Always wear working clothes and heavy-duty long  
trousers.  
•
Never start the machine:  
1
2
3
If you have spilt fuel on it. Wipe off the spillage and  
allow remaining fuel to evaporate.  
•
•
Never wear loose clothing or jewellery.  
Make sure your hair does not hang below shoulder level.  
If you spill fuel or chain oil on yourself or your clothes.  
Change your clothes.  
If the machine is leaking fuel.Check regularly for leaks  
from the fuel cap and fuel lines.  
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.  
Safety instructions regarding the  
surroundings  
•
•
Ensure the machine is cleaned and that a complete  
service is carried out before long-term storage.  
•
Never allow children to use the machine.  
•
Ensure that no-one comes closer than 15 m while you are  
working.  
The transport guard must always be fitted to the cutting  
attachment when the machine is being transported or in  
storage.  
•
•
Never allow anyone else to use the machine without first  
ensuring that they have understood the contents of the  
operator’s manual.  
WARNING! Take care when handling fuel.  
Bear in mind the risk of fire, explosion and  
inhaling fumes.  
Never work from a ladder, stool or any other raised  
position that is not fully secured.  
!
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SAFETY INSTRUCTIONS  
Safety instructions while working  
Safety instructions after completing work  
•
•
Always ensure you have a safe and stable working  
position  
•
•
The transport guard should always be fitted to the cutting  
attachment when the machine is not in use.  
Always use both hands to hold the machine. Hold the  
machine at the side of your body.  
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. The blades are very sharp and can easily  
cause cuts.  
•
Use your right hand to control the throttle setting.  
•
•
Store the machine out of reach of children.  
Use only original spare parts for repairs.  
Basic working techniques  
•
Work with a swinging action from the bottom upwards  
when trimming sides.  
•
•
•
•
•
•
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 blades until they have stopped.  
Watch out for stumps of branches that can be thrown out  
during cutting.  
Always lay the machine on the ground when you are not  
using it.  
Do not cut too close to the ground. Stones and other  
objects can be thrown out.  
•
•
Adjust the throttle setting to suit the load.  
When trimming a hedge the engine should always face  
away from the hedge.  
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.  
•
Hold the machine as close to your body as possible to get  
the best balance.  
•
•
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.  
•
•
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.  
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.  
10 – English  
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SAFETY INSTRUCTIONS  
Changing the hedge trimmer angle  
(326HE3, 326HE4)  
•
•
Undo the knob.  
Grasp the handle on the angle stop, adjust to the desired  
angle and then tighten the knob.  
(326HDA55)  
• Undo the knob.  
•
Press the cutting head against the ground or some other  
solid object until the desired angle has been obtained.  
•
Tighten the knob.  
CAUTION! Do not hold the cutting head when you adjust  
the angle. The blades are sharp and you could easily cut  
yourself.  
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WHAT IS WHAT?  
7
21  
11  
4
326HE4  
326HDA55  
1
21  
22  
3
19  
6
20  
9
2
10  
12  
25  
18  
17  
5
24  
15  
8
13  
27  
16  
28  
23  
26  
14  
What is what?  
1
2
3
4
5
6
7
8
9
Cutter  
15 Choke control  
16 Air purge  
Grease nipples (3)  
Bevel gear  
17 Air filter cover  
18 Clutch cover  
Cutter guard (326HDA55)  
Shaft  
19 Hand guard mounting screw (326HDA55/326HE3)  
20 Angle adjustment handle (326HE3, 326HE4)  
21 Angle adjustment knob  
Front handle (326HDA55/326HE3)  
Front handle (326HE4)  
Throttle control  
22 Hand guard (326HDA55/326HE3)  
23 Combination spanner  
Stop switch  
10 Throttle lock  
24 Operator’s manual (EPA)  
25 Transport guard  
11 Harness support hook (326HE4)  
12 Cylinder cover  
26 Allen key  
13 Starter handle  
27 Harness (326HE4)  
14 Fuel tank  
28 Impact guard (326HE4)  
12 – English  
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ASSEMBLY  
Fitting the hand guard and loop  
handle  
Fitting the cutting head  
It is important that the hedge trimmer is laid on a flat surface  
when you fit the cutting head.Otherwise the cutting head may  
not be fitted straight.  
(326HDA55/326HE3)  
1
Assemble the hand guard and loop handle by screwing  
them together. Take care to align the holes in both parts.  
1
Fit the cutting head to the shaft. CAUTION! Make sure the  
drive shaft inside the shaft engages with the recess in the  
cutting head.  
2
Tighten the lower screw first, then the upper screw.  
2
3
4
Slide the loop handle and hand guard onto the shaft.  
Slide the spacer into the slot in the loop handle.  
Fit the nut and screw. Do not overtighten.  
Adjusting the harness  
(326HE4)  
You should always use the harness with the machine to give  
maximum control over the machine and reduce the risk of  
fatigue in your arms and back.  
1
2
3
Put on the harness.  
Hook the machine onto the harness support hook.  
Adjust the length of the harness so that the support hook  
is roughly level with your right hip.  
5
Now make a final adjustment to give yourself a  
comfortable working position. Tighten the screw.  
CAUTION! The loop handle and hand guard must not be  
fitted behind the arrow marked on the shaft.  
Fitting the impact guard  
(326HE4)  
Fitting the handle  
(326HE3, 326HE4)  
Fit the guard using the three screws and washers. Fit the two  
short screws in hole A. Tighten the screws to a torque of 4  
Nm. After the machine has been in use for around 20 hours,  
re-tighten the screws to 4 Nm.  
Fit the handle using two screws.  
English – 13  
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FUEL HANDLING  
Two-stroke oil  
Fuel  
•
For best results and performance use HUSQVARNA two-  
stroke oil, which is specially formulated for our two-stroke  
engines. Mixture 1:50 (2%).  
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  
outboard engines, sometimes referred to as outboard oil.  
Never use oil intended for four-stroke engines.  
Gasoline, litre  
Two-stroke oil, litre  
2% (1:50)  
0,10  
WARNING! Always ensure there is adequate  
ventilation when handling fuel.  
3% (1:33)  
0,15  
!
5
10  
0,20  
0,30  
15  
0,30  
0,45  
Gasoline  
20  
0,40  
0,60  
US gallon  
US fl. oz.  
2% (1:50)  
2 1/2  
3% (1:33)  
3 3/4  
CAUTION!  
1
Always use high grade unleaded oil mixed gasoline (minimum  
87 RON). 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.  
2 1/2  
5
6 1/2  
9 3/4  
12 7/8  
19 1/4  
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.  
•
Mix (shake) the fuel mixture thoroughly before filling the  
machine’s fuel tank.  
•
•
The lowest recommended octane rating is 87. If you run  
the engine on lower octane rating than 87 so-called  
“knocking“ can occur. This leads to an increased engine  
temperature, which can result in a serious engine  
breakdown.  
When working at continuous high revs a higher octane  
rating is recommended.  
•
•
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.  
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.  
14 – English  
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FUEL HANDLING  
Fuelling  
WARNING!Taking the following precautions,  
will lessen the risk of fire:  
!
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.  
•
•
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 – 15  
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STARTING AND STOPPING  
Check before starting  
Starting and stopping  
•
•
Inspect the working area. Remove any objects that could  
be thrown out.  
Starting  
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.  
!
A
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.  
B
•
•
•
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 blades do not move when the engine is  
idling.  
Cold engine  
•
•
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.  
Ignition: Set the stop switch to the start position.  
Choke: Set the choke control in the choke position.  
Air purge: Press the air purge diaphragm repeatedly until  
fuel begins to fill the diaphragm. The diaphragm need not be  
completely filled.  
Warm engine  
Ignition: Set the stop switch to the start position.  
Air purge: Press the air purge diaphragm repeatedly until  
fuel begins to fill the diaphragm. The diaphragm need not be  
completely filled.  
16 – English  
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STARTING AND STOPPING  
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 stopped by switching the ignition off using the  
stop switch.  
English – 17  
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MAINTENANCE  
Fine adjustment  
Carburettor  
•
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.  
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.  
Conditions  
•
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.  
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.  
!
•
•
•
Carefully turn both jets, L and H, so that they are midway  
between fully screwed in and fully screwed out.  
Do not attempt to adjust the L and H jets beyond either  
stop as this could cause damage.  
Function  
Now start the machine according to the starting  
instructions and let it warm up for 10 minutes.  
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 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.  
Low speed jet L  
•
•
The setting of the carburetor means that the engine is  
adepted to local conditions, for example, the climate,  
altitude, fuel and the type of 2-stroke oil.  
Try to find the highest idling speed, turning the low speed  
needle L clockwise respectively counter-clockwise.When the  
highest speed has been found, turn the low speed needle L 1/  
4 turn counter-clockwise.  
The carburettor has three adjustment controls:  
L = Low speed jet  
+ 1/4  
H = High speed jet  
T = Idle adjustment screw  
•
•
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  
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.  
Basic setting  
•
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.  
The blades must also remain stationary when the choke  
control is in the start throttle position.  
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.  
+ 1/4  
Rec. idle speed: 2700 rpm  
Recommended max. speed: See the Technical data section.  
L
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.  
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.  
18 – English  
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MAINTENANCE  
High speed jet H  
Muffler  
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.  
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.  
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.  
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.  
H
Note that the engine should not be under load when you  
adjust the high speed jet H.You should therefore remove the  
cutting attachment, nut, support flange and drive disc before  
adjusting 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.  
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.  
CAUTION! For optimum adjustment of the carburettor,  
contact a qualified dealer/service workshop that has a  
revolution counter at their disposal.  
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.  
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  
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.  
CAUTION! Never use a machine with a defective muffler.  
WARNING! Mufflers fitted with catalytic  
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.  
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!  
!
If both the L and H jets are set too rich it will results in  
acceleration problems or too low a working speed.  
English – 19  
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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:  
The cooling system consists of:  
•
•
•
•
•
Carburettor malfunctions  
Starting problems  
4
Loss of engine power  
3
2
Unnecessary wear to engine parts  
Excessive fuel consumption.  
Clean the filter every 25 hours, or more regularly if conditions  
are exceptionally dusty.  
1
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).  
Cleaning the air filter  
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.  
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.  
Spark plug  
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.  
Oiling the air filter  
An incorrect fuel mixture (too much or incorrect type of  
oil).  
•
A dirty 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.  
These factors cause deposits on the spark plug electrodes,  
which may result in operating problems and starting  
difficulties.  
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.  
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 (0,020"). The spark plug  
should be replaced after about a month in operation or earlier  
if necessary.  
CAUTION! Always use the recommended spark plug type!  
Use of the wrong spark plug can damage the piston/cylinder.  
20 – English  
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MAINTENANCE  
5
Check that the hand guard is not damaged. Replace the  
guard if damaged.  
Gear housing  
6
7
Check that nuts and screws are tight.  
Check that there are no fuel leaks from the engine, tank or  
fuel lines.  
There are three grease nipples on the gear housing. Use a  
grease gun to top up with grease. This should be carried out  
approximately every 20 working hours. Use Husqvarna  
special grease, part no. 503 98 96-01.  
Weekly maintenance  
5
2
3
4
1
6
7
8
9
1
2
Check the starter, the starter cord and the recoil spring.  
Check that the vibration damping elements are not  
damaged.  
The grease in the bevel gear does not normally need to be  
changed except if repairs are carried out.  
3
Clean the outside of the spark plug. Remove and check  
the electrode gap. Adjust the gap to 0.5 mm or change the  
spark plug.  
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.  
Always lubricate the blade bars with special grease, part no.  
531 00 60-74 (UL 21) before use.  
8
9
Fill the gear housing with grease. This should be carried  
out approximately every 20 working hours.  
Check that the screws that hold the blades together are  
correctly tightened.  
Monthly maintenance  
2
1
3
Maintenance schedule  
Below you will find some general maintenance instructions. If  
you need further information please contact your service  
workshop.  
5
4
6
7
Daily maintenance  
A
1
2
Clean the fuel tank.  
2
3
4
1
Clean the outside of the carburettor and the space around  
it.  
B
3
4
Clean the fan and the area around it.  
5
6
7
8
Check fuel hose for cracks or other damage. Change if  
necessary.  
5
6
Check all cables and connections.  
Check the clutch, clutch springs and the clutch drum for  
wear. Replace if necessary.  
1
2
3
Clean the outside of the machine.  
Check that the stop switch works correctly.  
7
8
Replace the spark plug. Check that the spark plug is fitted  
with a suppressor.  
Check that the blades do not move when the engine is  
idling or when the choke is in the start throttle position.  
Check and clean the spark arrestor mesh on the muffler  
(only applies to mufflers fitted with a catalytic converter).  
4
Clean the air filter. Replace if necessary.  
English – 21  
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TECHNICAL DATA  
Technical data  
326HDA55  
326HE3  
326HE4  
Engine  
3
Cylinder volume, cu.in/cm  
Cylinder bore, inch/mm  
Stroke, inch/mm  
Idle speed, rpm  
1,50/24,5  
1,34/34,0  
1,06/27  
2700  
1,50/24,5  
1,34/34,0  
1,06/27  
2700  
1,50/24,5  
1,34/34,0  
1,06/27  
2700  
Recommended max. speed, rpm  
Max. engine output, acc. to ISO 8893, kW/ rpm  
Catalytic converter muffler  
Speed-regulated ignition system  
Ignition system  
9500-10500  
0,9/9000  
Yes  
9500-10500  
0,9/9000  
Yes  
9500-10500  
0,9/9000  
Yes  
Yes  
Yes  
Yes  
Manufacturer/type of ignition system  
Spark plug  
WalbroMB/SEM AM49 WalbroMB/SEM AM49 WalbroMB/SEM AM49  
NGK BPMR 7A  
0,02/0,5  
NGK BPMR 7A  
0,02/0,5  
NGK BPMR 7A  
0,02/0,5  
Electrode gap, inch/mm  
Fuel and lubrication system  
Manufacturer/type of carburettor  
Fuel tank capacity, US pint/litre  
Weight  
Zama C1Q  
1,06/0,5  
Zama C1Q  
1,06/0,5  
Zama C1Q  
1,06/0,5  
Weight without fuel, kg  
12,1/5,5  
12,6/5,7  
12,8/5,8  
Sound levels  
(see note 1)  
Equivalent noise pressure level at the operator’s ear,  
measured according to EN/ISO 11806 and ISO 7917,  
dB(A), min./max.:  
94  
92  
88  
Vibration levels  
Vibration levels at handles, measured according to  
2
EN/ISO 11806 and ISO 7916, m/s  
Idle speed, rear/front handles:  
Max. speed, rear/front handles:  
Blades  
3,1/4,1  
5,4/4,4  
1,9/3,4  
6,7/4,6  
2,2/2,6  
4,9/6,0  
Length, mm  
550  
550  
550  
Blade speed, cuts/min  
4184  
4184  
4184  
Note 1: Equivalent noise pressure level is calculated as the time-weighted energy total for noise pressure levels under various  
working conditions with the following time distribution: 1/2 idle and 1/2 max. speed.  
´®z+H4)¶5Y¨  
22 – English  
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FEDERAL EMISSION CONTROL WARRANTY STATEMENT  
WHAT IS COVERED  
YOUR WARRANTY RIGHTS AND  
OBLIGATIONS  
REPAIR OR REPLACEMENT OF PARTS Repair or  
replacement of any warranted part will be performed at no  
charge to the owner at an approved Husqvarna Forest &  
Garden servicing dealer. If you have any questions regarding  
your warranty rights and responsibilities, you should contact  
your nearest authorized servicing dealer or call Husqvarna  
Forest & Garden at 1-800-487-5963  
The EPA (The US Environmental Protection Agency),  
Environment Canada and Husqvarna Forest & Garden are  
pleased to explain the emissions control system warranty on  
your 2001 and later small nonroad engine. In U.S. and  
Canada, new small nonroad engines must be designed, built  
and equipped to meet the federal stringent anti-smog  
standards. Husqvarna Forest & Garden must warrant the  
emission control system on your small nonroad engine for the  
period of time listed below provided there has been no abuse,  
neglect or improper maintenance of your unit.Your emmission  
control system includes Parts such as the carburetor and the  
ignition system. Where a warrantable condition exists,  
Husqvarna Forest & Garden will repair your small nonroad  
engine at no cost to you. Expenses covered under warranty  
include diagnosis, parts and labor.  
WARRANTY PERIOD Any warranted part which is not  
scheduled for replacement as required maintenance, or  
which is scheduled only for regular inspection to the effect of  
“repair or replace as necessary” shall be warranted for 2  
years.Any warranted part which is scheduled for replacement  
as required maintenance shall be warranted for the period of  
time up to the first scheduled replacement point for that part.  
DIAGNOSIS The owner shall not be charged for diagnostic  
labor which leads to the determination that a warranted part  
is defective, if the diagnostic work is performed at an  
approved Husqvarna Forest & Garden servicing dealer.  
′
MANUFACTURER S WARRANTY  
COVERAGE  
CONSEQUENTIAL DAMAGES Husqvarna Forest & Garden  
may be liable for damages to other engine components  
caused by the failure of a warranted part still under warranty.  
The 2001 and later small nonroad engines are warranted for  
two years. If any emission related part on you engine (as  
listed above) is defective, the part will be repaired or replaced  
by Husqvarna Forest & Garden.  
WHAT IS NOT COVERED  
All failures caused by abuse, neglect or improper  
maintenance are not covered.  
′
OWNER S WARRANTY  
RESPONSIBILITIES  
ADD -ON OR MODIFIED PARTS  
As the small nonroad engine owner, you are responsible for  
the performance of the required maintenance listed in your  
Operator′s Manual. Husqvarna Forest & Garden  
The use of add-on or modified parts can be grounds for  
disallowing a warranty claim. Husqvarna Forest & Garden is  
not liable to cover failures of warranted parts caused by the  
use of add-on or modified parts.  
recommends that you retain all receipts covering  
maintenance on your small nonroad engine, but Husqvarna  
Forest & Garden cannot deny warranty solely for the lack of  
receipts or for your failure to ensure the performance of all  
scheduled maintenance. As the small nonroad engine owner,  
you should, however, be aware that Husqvarna Forest &  
Garden may deny you warranty coverage if your small  
nonroad engine or a part of it has failed due to abuse, neglect,  
improper maintenance, unapproved modifications or the use  
of parts not made or approved by the original equipment  
manufacturer.You are responsible for presenting your small  
nonroad engine to a Husqvarna Forest & Garden authorized  
servicing dealer as soon as a problem exists. The warranty  
repairs should be completed in a reasonable amount of time,  
not to exceed 30 days. If you have any questions regarding  
your warranty rights and responsibilities, you should contact  
your nearest authorized servicing dealer or call Husqvarna  
Forest & Garden at 1-800-487-5963  
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-  
487-5963  
WHERE TO GET WARRANTY SERVICE  
Warranty services or repairs shall be provided at all  
Husqvarna Forest & Garden authorized servicing dealers.  
MAINTENANCE, REPLACEMENT AND  
REPAIR OF EMISSION-RELATED PARTS  
Any Husqvarna Forest & Garden approved replacement part  
used in the performance of any warranty maintenance or  
repairs on emission-related parts, will be provided without  
charge to the owner if the part is under warranty.  
WARRANTY COMMENCEMENT DATE  
The warranty period begins on the date small nonroad engine  
is delivered.  
EMISSION CONTROL WARRANTY PARTS  
LIST  
LENGTH OF COVERAGE  
1
2
3
4
Carburetor and internal parts  
Husqvarna Forest & Garden warrants to the initial owner and  
each subsequent purchaser that the engine is free from  
defects in materials and workmanship which cause the failure  
of a warranted part for a period of two years.  
Intake pipe, airfilter holder and carburetor bolts.  
Airfilter and fuelfilter covered up to maintenance schedule.  
Ignition System  
1
2
Spark Plug, covered up to maintenance schedule  
Ignition Module  
5
Muffler with catalytic converter  
MAINTENANCE STATEMENT  
The owner is responsible for the performance of all required  
maintenance, as defined in the operator’s manual.  
English – 23  
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1140200-95  
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´®z+H4)¶5Y¨  
2003-09-15  
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