Page 1
Oper ator ′ s manual
Please read the oper ator’s manual carefully and
make sure you understand the instructions
before using the machine.
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KEY T O SYMBOLS
Symbols
ARNING! A clearing saw, brushcutter or
trimmer can be dangerous if used
incorrectly or carelessly, and can cause
serious or fatal injury to the operator or
others. It is extremely important that you
read and understand the contents of this
operator’s manual.
Please read the operator’s manual
carefully and make sure you understand
the instructions before using the machine.
Always wear:
• A protective helmet where there is a risk
of falling objects
• Approved hearing protection
• Approved eye protection
Max. speed of output shaft, rpm
This product is in accordance with
applicable EC directives.
Only use non-metallic , flexible cutting
attachments, i.e. trimmer heads with
trimmer cord.
Noise emission to the en vironment
according to the European Community’s
Directive. The machine’s emission is
specified in chapter Technical data and on
label.
Other symbols/decals on the mac hine refer to
special certification requirements for certain
markets.
Switch off the engine b y moving the stop
switch to the STOP position before carrying
out any checks or maintenance.
Alw ays wear approved protective gloves.
Regular cleaning is required.
atch out for thrown objects and
ricochets.
The oper ator of the machine must ensure,
while working, that no persons or animals
come closer than 15 metres.
Machines fitted with saw blades or grass
blades can be thrown violently to the side
when the blade comes into contact with a
fixed object. This is called blade thrust. The
blade is capable of amputating an arm or
leg. Always keep people and animals at
least 15 metres from the machine.
Arrows which show limits for handle
positioning.
Alw ays wear approved protective gloves.
15 m
50FT
50FT
Visual chec k.
15 m
ear sturdy, non-slip boots.
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CONTENTS
Contents
KEY TO SYMBOLS
Symbols ....................................................................... 2
CONTENTS
Contents ...................................................................... 3
Note the following before starting: ................................ 3
INTR ODUCTION
Dear Customer , ............................................................ 4
WHA T IS WHAT?
What is what on the br ush cutter? ............................... 5
GENERAL SAFETY PRECA UTIONS
Impor tant ...................................................................... 6
Personal protective equipment ..................................... 6
Machine ′ s safety equipment ........................................ 7
Cutting equipment ........................................................ 8
ASSEMBL Y
Fitting the main body ................................................... 9
Connecting throttle cable and stop switch wires .......... 9
Fitting the handle ......................................................... 9
Assembling the cutting equipment ............................... 10
FUEL HANDLING
Fuel saf ety ................................................................... 11
Fuel .............................................................................. 11
Fuelling ........................................................................ 12
ARTING AND STOPPING
Chec k before starting ................................................... 13
Starting and stopping ................................................... 13
ORKING TECHNIQUES
Gener al working instructions ....................................... 14
MAINTENANCE
Carb urettor ................................................................... 16
Muffler .......................................................................... 16
Cooling system ............................................................ 17
Spark plug .................................................................... 17
Air filter ......................................................................... 17
Maintenance schedule ................................................. 18
TECHNICAL D ATA
echnical data .............................................................. 19
EC-declaration of conformity ........................................ 20
Note the f ollowing before starting:
Please read the oper ator’s manual carefully.
ARNING! Long-term exposure to noise can
result in permanent hearing impairment. So
!
always use approved hearing protection.
ARNING! 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.
ARNING! A clearing saw, brushcutter or
trimmer can be dangerous if used
!
incorrectly or carelessly, and can cause
serious or fatal injury to the operator or
others. It is extremely important that you
read and understand the contents of this
operator’s manual.
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Page 4
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INTR ODUCTION
Dear Customer ,
Cong ratulations on your choice to buy a Jonsered product!
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 operator ′ s
manual as a valuable document. By following its
of the machine can be extended. If you will sell this machine, make sure that the buyer will get the operator
Good luck on using your Jonsered machine!
Jonsered has a policy of continuous product development and therefore reserves the right to modify the design and appearance
of products without prior notice.
content (using, service, maintenance etc) the life span and the second-hand value
s manual.
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Page 5
1
WHA T IS WHA T?
1
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19
7
14 15
2
3
6
13
12
10
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8
9
17
1618
What is what on the grass trimmer?
Trimmer head
2 Cord cutter
3 Cutting attachment guard
4 Shaft
5 Loop handle
6 Throttle control
7 Stop switch
8 Starter handle
9 Fuel tank
10 Choke control
11 Air purge
12 Air filter cover
13 Clutch cover
14 Cylinder cover
15 Spark plug cap and spark plug
16 Combination spanner
17 Locking pin
18 Spanner
19 Operator ′ s manual
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Page 6
6
GENERAL SAFETY PRECA UTIONS
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Impor tant
IMPORTANT!
The machine is only designed for trimming grass.
The only accessories you can operate with this engine unit
are the cutting attachments we recommend in the chapter
on Technical data.
Never use the machine if you are tired, if you have drunk
alcohol, or if you are taking medication that could affect your
vision, your judgement or your co-ordination.
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.
All covers, guards and handles must be fitted before
starting. Ensure that the spark plug cap and ignition lead
are undamaged to avoid the risk of electric shock.
The machine operator must ensure that no people or
animals come closer than 15 metres while working. When
several operators are working in the same area the safety
distance should be at least twice the tree height and no less
than 15 metres.
ARNING! Listen out for warning signals or
shouts when you are wearing hearing
!
protection. Always remove your hearing
protection as soon as the engine stops.
HEARING PR OTECTION
Wear hearing protection that provides adequate noise
reduction.
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.
GLOVES
Gloves should be worn when necessary, e.g., when fitting
cutting attachments.
ARNING! This machine produces an
electromagnetic field during operation. This
!
field may under some circumstances
interfere with active or passive medical
implants. To reduce the risk of serious or
fatal injury, we recommend persons with
medical implants to consult their physician
and the medical implant manufacturer
before operating this machine.
ARNING! Running an engine in a confined
or badly ventilated area can result in death
!
due to asphyxiation or carbon monoxide
poisoning.
Personal protective equipment
IMPOR TANT!
A clearing saw, brushcutter or trimmer can be dangerous if
used incorrectly or carelessly, and can cause serious or
fatal injury to the operator or others. It is extremely
important that you read and understand the contents of this
operator’s manual.
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.
BOOTS
Wear sturdy, non-slip boots.
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.
FIRST AID KIT
Always have a first aid kit nearby.
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GENERAL SAFETY PRECA UTIONS
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Mac hine ′ s safety equipment
This section descr ibes 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.
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 machine
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.
ARNING! 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.
Stop s witch
s
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.
For mufflers it is very important that you follow the instructions
on checking, maintaining and servicing your machine.
Never use a machine that has a faulty muffler.
Regularly check that the muffler is securely attached to the
machine.
Use the stop s witch to switch off the engine.
Start the engine and make sure the engine stops when you
move the stop switch to the stop setting.
Muffl er
The m uffler 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.
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.
ARNING! 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!
ARNING! 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!
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Page 8
GENERAL SAFETY PRECAUTIONS
Cutting equipment
This section describes how to choose and maintain your
cutting equipment in order to:
• Reduce the risk of blade thrust.
• Obtain maximum cutting performance.
• Extend the life of cutting equipment.
IMPORTANT!
Only use cutting attachments with the guards we
recommend! See the chapter on Technical data.
Refer to the instructions for the cutting attachment to check
the correct way to load the cord and the correct cord
diameter.
WARNING! Always stop the engine before
doing any work on the cutting 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.
WARNING! A faulty cutting attachment may
increase the risk of accidents.
!
Trimmer head
IMPORTANT!
Always ensure the trimmer cord is wound tightly and evenly
around the drum, otherwise the machine will generate
harmful vibration.
• Only use the recommended trimmer heads and trimmer
cords. These have been tested by the manufacturer to suit
a particular engine size. This is especially important when
a fully automatic trimmer head is used. Only use the
recommended cutting attachment. See the chapter on
Technical data.
• Smaller machines generally require small trimmer heads
and vice versa. This is because when clearing using a
cord the engine must throw out the cord radially from the
trimmer head and overcome the resistance of the grass
being cleared.
• The length of the cord is also important. A longer cord
requires greater engine power than a shorter cord of the
same diameter.
• Make sure that the cutter on the trimmer guard is intact.
This is used to cut the cord to the correct length.
• To increase the life of the cord it can be soaked in water
for a couple of days. This will make the line tougher so that
it lasts longer.
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Page 9
ASSEMBLY
Fitting the main body
Connect the engine (A) to the tube (B) with four screws (C).
A
C
B
Connecting throttle cable and stop switch wires
1 Fit the plastic tube (B) around the throttle cable and stop
switch wires as shown.
6 Connect the stop switch wires to the wires from the engine
(it is not important which wire is connected to which).
Adjusting the throttle wire
1 Loosen the lock-nut (C) and adjust the cable adjuster
sleeve (D) so the stop on the carburettor throttle cam just
contacts the throttle stop and the cable position keep 1–2
mm play between cable lug and slotted fitting when the
throttle trigger is fully depressed.
2 When the throttle cable is adjusted correctly, tighten the
locking nut (C).
1-2mm
2 Insert the throttle cable through the cable adjuster sleeve
on the carburettor bracket. Make sure the end of the
throttle cable housing is seated positively in the sleeve.
3 Position the slotted fitting on the carburettor so the
recessed hole (A) is away from the cable adjuster sleeve.
4 Rotate the carburettor throttle cam and slip the throttle
cable through the slot in the slotted fitting, making sure the
cable lug drops into the recessed hole.
5 Press the throttle trigger a few times to check that it works.
Fitting the handle
1 Place the rubber sleeve A on the shaft B.
B
A
2 Position the handle as shown. Fit the mounting
components and tighten the handle lightly. Note that the
handle must be mounted below the arrow on the shaft.
3 Now make a final adjustment to give yourself a
comfortable working position. Tighten the screws.
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Page 10
ASSEMBLY
Assembling the cutting equipment
WARNING! Never use a cutting attachment
without an approved guard. See the chapter
!
on Technical data. If an incorrect or faulty
guard is fitted this can cause serious
personal injury.
Fitting the trimmer guard and trimmer head
• Attach the cord cutter (A) to the trimmer guard using two
M5x16 screws, locking washers and nuts as shown.
B
C
A
D
• Fit the guard (B) to the gear housing (C) using the support
plate (D) and two screws.
• Turn the output shaft until one of the holes in the drive disk
aligns with the corresponding hole in the gear housing.
• Insert the locking pin (E) in the hole to lock the shaft.
E
F
• Screw on the trimmer head (F) in the opposite direction to
the direction of rotation.
• Remove the locking pin.
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Page 11
FUEL HANDLING
Fuel safety
Never start the machine:
1 If you have spilt fuel on it. Wipe off the spillage and allow
remaining fuel to evaporate.
2 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.
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 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.
• The transport guard must always be fitted to the cutting
attachment when the machine is being transported or in
storage.
• Secure the machine during transport.
WARNING! Take care when handling fuel.
Bear in mind the risk of fire, explosion and
!
inhaling fumes.
Fuel
NB! The machine is equipped with a two-stroke engine and
must always been run using a mixture of petrol and two-stroke
oil. It is important to accurately measure the amount of oil to
be mixed to ensure that the correct mixture is obtained. When
mixing small amounts of fuel, even small inaccuracies can
drastically affect the ratio of the mixture.
WARNING! Fuel and fuel fumes are highly
inflammable and can cause serious injury
!
when inhaled or allowed to come in contact
with the skin. For this reason observe
caution when handling fuel and make sure
there is adequate ventilation.
Petrol
NB! Always use a quality petrol/oil mixture at least 90 octane
(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.
Use low-emission petrol, also known as alkylate petrol, if it is
available.
• 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 working at continuous high revs a higher octane
rating is recommended.
Two-stroke oil
• For best results and performance use JONSERED twostroke engine oil, which is specially formulated for our aircooled two-stroke engines.
• Never use two-stroke oil intended for water-cooled
engines, sometimes referred to as outboard oil (rated
TCW).
• Never use oil intended for four-stroke engines.
• Mixing ratio
1:50 (2%) with JONSERED two-stroke oil.
1:33 (3%) with oils class JASO FB or ISO EGB formulated
for air-cooled, two-stroke engines.
Petrol, litre
5 0,10 0,15
10 0,20 0,30
15 0,30 0,45
20 0,40 0,60
Two-stroke oil, litre
2% (1:50) 3% (1:33)
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Page 12
FUEL HANDLING
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.
• Mix (shake) the fuel mixture thoroughly before filling the
machine’s fuel tank.
• Do not mix more than one month’s supply of fuel at a time.
• If the machine is not used for some time the fuel tank
should be emptied and cleaned.
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.
• Always use a fuel container with an anti-spill valve.
• 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.
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Page 13
STARTING AND STOPPING
Check before starting
• Check that the trimmer head and trimmer guard are not
damaged or cracked. Replace the trimmer head or
trimmer guard if they have been exposed to impact or are
cracked.
• Never use the machine without a guard nor with a
defective guard.
• All covers must be correctly fitted and undamaged before
you start the machine.
Starting and stopping
WARNING! The complete clutch cover and
shaft must be fitted before the machine is
!
started, otherwise the clutch can come loose
and cause personal injury.
Always move the machine away from the
refuelling area before starting. Place the
machine on a flat surface. Ensure the cutting
attachment cannot come into contact with
any object.
Make sure no unauthorised persons are in
the working area, otherwise there is a risk of
serious personal injury. The safety distance
is 15 metres.
Cold engine
Ignition: Set the stop switch to the start position.
Primer bulb: Press the air purge repeatedly until fuel begins
to fill the bulb. The bulb need not be completely filled.
Choke: Set the choke control in the choke position.
Warm engine
Use the same starting procedure as for a cold engine but
without setting the choke control in the choke position.
Starting
WARNING! When the engine is started with
the choke in choke position the cutting
!
attachment will start to rotate immediately.
Hold the body of the machine on the ground using your left
hand (CAUTION! Not with your foot!). Grip the starter handle,
slowly pull out the cord with your right hand until you feel
some resistance (the starter pawls grip), now quickly and
powerfully pull the cord. Never twist the starter cord around
your hand.
Repeat pulling the cord until the engine starts. When the
engine starts, return choke control to run position.
CAUTION! Do not pull the starter cord all the way out and do
not let go of the starter handle when the cord is fully extended.
This can damage the machine.
Stopping
Stop the engine by switching off the ignition.
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Page 14
WORKING TECHNIQUES
General working instructions
IMPORTANT!
This section takes up the basic safety precautions for
working with a trimmer.
If you encounter a situation where you are uncertain how to
proceed you should ask an expert. Contact your dealer or
your service workshop.
Avoid all usage which you consider to be beyond your
capability.
You must understand the difference between forestry
clearing, grass clearing and grass trimming before use.
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.
Basic safety rules
1 Look around you:
• To ensure that people, animals or other things cannot
affect your control of the machine.
• To ensure that people, animals, etc., do not come into
contact with the cutting attachment or loose objects that
are thrown out by the cutting attachment.
• NB! Do not use the machine unless you are able to call
for help in the event of an accident.
2 Inspect the working area. Remove all loose objects, such
as stones, broken glass, nails, steel wire, string, etc. that
could be thrown out or become wrapped around the
cutting attachment.
3 Do not use the machine in bad weather, such as dense
fog, heavy rain, strong wind, intense cold, etc. Working in
bad weather is tiring and often brings added risks, such as
icy ground, unpredictable felling direction, etc.
4 Make sure you can move and stand safely. Check the area
around you for possible obstacles (roots, rocks, branches,
ditches, etc.) in case you have to move suddenly. Take
great care when working on sloping ground.
5 Keep a good balance and a firm foothold.
6 Always hold the machine with both hands. Hold the
machine on the right side of your body.
7 Keep the cutting attachment below waist level.
8 The engine must be switched off before moving.
9 Never put the machine down with the engine running
unless you have it in clear sight.
WARNING! Neither the operator of the
machine nor anyone else may attempt to
!
remove the cut material while the engine is
running or the cutting equipment is rotating,
as this can result in serious injury.
Stop the engine and cutting equipment
before you remove material that has wound
around the blade shaft as otherwise there is
a risk of injury. The bevel gear can get hot
during use and may remain so for a while
afterwards. You could get burnt if you touch
it.
WARNING! Watch out for thrown objects.
Always wear approved eye protection. Never
!
lean over the cutting attachment guard.
Stones, rubbish, etc. can be thrown up into
the eyes causing blindness or serious injury.
Keep unauthorised persons at a distance.
Children, animals, onlookers and helpers
should be kept outside the safety zone of 15
m. Stop the machine immediately if anyone
approaches. Never swing the machine
around without first checking behind you to
make sure no-one is within the safety zone.
Basic working techniques
Always slow the engine to idle speed after each working
operation. Long periods at full throttle without any load on the
engine can lead to serious engine damage.
WARNING! Sometimes branches or grass
get caught between the guard and cutting
!
attachment. Always stop the engine before
cleaning.
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Page 15
WORKING TECHNIQUES
Grass trimming with a trimmer head
Trimming
• Hold the trimmer head just above the ground at an angle.
It is the end of the cord that does the work. Let the cord
work at its own pace. Never press the cord into the area
to be cut.
• The cord can easily remove grass and weeds up against
walls, fences, trees and borders, however it can also
damage sensitive bark on trees and bushes, and damage
fence posts.
• Reduce the risk of damaging plants by shortening the
cord to 10-12 cm and reducing the engine speed.
Clearing
• The clearing technique removes all unwanted vegetation.
Keep the trimmer head just above the ground and tilt it. Let
the end of the cord strike the ground around trees, posts,
statues and the like. CAUTION! This technique increases
the wear on the cord.
Sweeping
• The fan effect of the rotating cord can be used for quick
and easy clearing up. Hold the cord parallel to and above
the area to be swept and move the tool to and fro.
• When cutting and sweeping you should use full throttle to
obtain the best results.
• The cord wears quicker and must be fed forward more
often when working against stones, brick, concrete, metal
fences, etc., than when coming into contact with trees and
wooden fences.
• When trimming and clearing you should use less than full
throttle so that the cord lasts longer and to reduce the
wear on the trimmer head.
Cutting
• The trimmer is ideal for cutting grass that is difficult to
reach using a normal lawn mower. Keep the cord parallel
to the ground when cutting. Avoid pressing the trimmer
head against the ground as this can ruin the lawn and
damage the tool.
• Do not allow the trimmer head to constantly come into
contact with the ground during normal cutting. Constant
contact of this type can cause damage and wear to the
trimmer head.
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Page 16
MAINTENANCE
Carburettor
Your Jonsered product has been designed and manufactured
to specifications that reduce harmful exhaust fumes. The
engine will be run in after it has used 8-10 tanks of fuel. To
ensure that the engine runs at peak performance and
produces as little harmful exhaust fumes as possible after the
running-in period, ask your dealer/service workshop (which
has a rev counter for this purpose) to adjust your carburettor.
Function
• 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.
• 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.
Adjusting the idle 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.
Before any adjustments are made, make sure that the air filter
is clean and the air filter cover is fitted.
Adjust the idle speed using the idle adjustment screw T, if it is
necessary to readjust. First turn the idle adjustment screw T
clockwise until the cutting attachment starts to rotate. Then
turn the screw anticlockwise until the cutting attachment
stops. The idle speed is correctly adjusted when the engine
will run smoothly in every position. The idle speed should also
be well below the speed at which the cutting attachment starts
to rotate.
Muffler
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.
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.
On mufflers without a catalytic converter the mesh should be
cleaned weekly, or replaced if necessary. On mufflers fitted
with a catalytic converter the mesh should be checked, and if
necessary cleaned, monthly. If the mesh is damaged it
should be replaced. If the mesh is frequently blocked, this
can be a sign that the performance of the catalytic converter
is impaired. Contact your dealer to inspect the muffler. A
blocked mesh will cause the machine to overheat and result
in damage to the cylinder and piston. See also instructions
under the heading Maintenance.
CAUTION! Never use a machine with a defective muffler.
!
16 – English
WARNING! If the idle speed cannot be
adjusted so that the cutting attachment
stops, contact your dealer/service
workshop. Do not use the machine until it
has been correctly adjusted or repaired.
WARNING! 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!
Page 17
MAINTENANCE
Cooling system
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
2
1
The cooling system consists of:
1 Cooling fins on the cylinder.
2 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.
Spark plug
The spark plug condition is influenced by:
• 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 before taking
any further action. If the spark plug is dirty, clean it and check
that the electrode gap is 0,6-0,7 mm. The spark plug should
be replaced after about a month in operation or earlier if
necessary.
0,6 - 0,7 mm
Air filter
The air filter must be regularly cleaned to remove dust and dirt
in order to avoid:
• Carburettor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary wear to engine parts.
• Excessive fuel consumption.
Clean the filter every 25 hours, or more regularly if conditions
are exceptionally dusty.
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.
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.
Oiling the air filter
Always use special filter oil. 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.
English – 17
Page 18
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 authorized service workshop.
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.
Check that the stop switch works correctly. X
Check that the handle and handlebar are undamaged and secured
correctly.
Check that the cutting attachment does not rotate at idle. X
Clean the air filter. Replace if necessary. X
Check that nuts and screws are tight. X
Check that there are no fuel leaks from the engine, tank or fuel lines. X
Check that the guard is undamaged and not cracked. Replace the guard if
it has been exposed to impact or is cracked.
Check that the trimmer head is undamaged and not cracked. Replace the
trimmer head if necessary.
Check the starter and starter cord. X
Clean the outside of the spark plug. Remove it and check the electrode
gap. Adjust the gap to 0,6 mm or replace the spark plug. Check that the
spark plug is fitted with a suppressor.
Clean the machine’s cooling system. 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. X
Clean the fuel tank. X
Check the fuel filter from contamination and the fuel hose from cracks or
other defects. Replace if necessary.
Check all cables and connections. X
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.
Check and clean the spark arrestor mesh on the muffler (only applies to
mufflers fitted with a catalytic converter).
Daily
maintenance
X
X
X
X
Weekly
maintenance
X
X
Monthly
maintenance
X
X
X
X
18 – English
Page 19
TECHNICAL DATA
Technical data
Technical data GT2123
Engine
Cylinder displacement, cm
Cylinder bore, mm 32,2
Stroke, mm 28
Idle speed, rpm 3000
Recommended max. speed, rpm 10000
Speed of output shaft, rpm 10000
Max. engine output, acc. to ISO 8893, kW/ rpm 0,59/7000
Catalytic converter muffler No
Speed-regulated ignition system No
Ignition system
Spark plug NGK BPMR 6Y
Electrode gap, mm 0,6-0,7
Fuel and lubrication system
Fuel tank capacity, litre 0,55
Weight
Weight without fuel, cutting attachment and guard, kg 4,2
Noise emissions
(see note 1)
Sound power level, measured dB(A) 109
Sound power level, guaranteed LWA dB(A) 111
Sound levels
(see note 2)
Equivalent sound pressure level at the operator’s ear,
measured according to EN ISO 11806 and ISO 22868,
dB(A):
Equipped with trimmer head (original) 97
Vibration levels
(see note 3)
Equivalent vibration levels (a
according to EN ISO 11806 and ISO 22867, m/s
Equipped with trimmer head (original), left/right 5,1/5,1
3
) at handles, measured
hv,eq
22,8
2
Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC. Reported
sound power level for the machine has been measured with the original cutting attachment that gives the highest level. The
difference between guaranteed and measured sound power is that the guaranteed sound power also includes dispersion in the
measurement result and the variations between different machines of the same model according to Directive 2000/14/EC.
Note 2: Reported data for equivalent sound pressure level for the machine has a typical statistical dispersion (standard deviation)
of 1 dB (A).
Note 3: Reported data for equivalent vibration level has a typical statistical dispersion (standard deviation) of 1 m/s2.
Approved accessories Type Cutting attachment guard, Art. no.
Trimmer head Maruyama Tap-N-Go 4 inch 575 68 26-01
English – 19
Page 20
TECHNICAL DATA
EC-declaration of conformity (Applies to Europe only)
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: +46-36-146500, declare that the grass trimmers Jonsered GT2123 with
serial numbers dating from 2009 onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with
the requirements of the COUNCIL’S DIRECTIVE:
- of May 17, 2006 "relating to machinery" 2006/42/EC
- of December 15, 2004 ”relating to electromagnetic compatibility” 2004/108/EC.
- 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: EN ISO 12100-2:2003, CISPR 12:2007, EN ISO 11806:2008
SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has performed voluntary type examination on
behalf of Husqvarna AB. The certificates are numbered: SEC/09/2070
Huskvarna December 29, 2009
Bo Jonsson, Development manager (Authorized representative for Husqvarna AB and responsible for technical documentation.)
20 – English
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Original instructions
1153405-26
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2010-02-26
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