Jonsered GC2128C Operator's Manual

Operator’s manual

Manual d’utilisation

Manual de instrucciones

US (2-27)
FR (28-53)
ES (54-79)

Please read these instructions and make sure you understand them before using the machine.
Lire attentivement et bien assimiler le manuel d’utilisation avant d’utiliser la machine.
Lea detenidamente el manual de instrucciones y asegúrese de entender su contenido antes de utilizar la máquina.

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545186870 Rev. 2 4/30/09

SYMBOL EXPLANATION

This product is in accordance
with applicable EC directives.

Noise emission to the
environment according to the
European Community’s
Directive. The machine’s
emission is specified in the
T echnical data section and
on label.

Sound pressure level at
7,5 metres

Use unleaded or quality leaded
petrol and two--stroke oil
mixed at a ratio of 2% (1:50).

Other symbols/decals on the machine
refer to special certification requirements
for certain markets.

Stop the engine by pushing
and holding the stop switch
in 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.

Regular cleaning is required.

Visual check.

Approved eye protection must
always be used.

Symbols

WARNING: Clearing saws, brush-

cutters and trimmers can be dan­gerous! Careless or incorrect use
can result in serious or fatal
injury to the operator or others.

Please read the operator’s manual
care fully and make sure you
understand the instructions
before using the machine.

Always wear:
S A protective helmet where there

is a risk of falling objects

S Hearing protection
S Approved eye protection

Max. speed of output shaft, rpm

Beware of thrown objects and
ricochets.

The operator of the machine
shall ensure, while working,
that no persons or animals
come closer than 15 metres.

Machines fitted with grass blades
can be thrown violently to the side
when the blade comes into contact
with a fixed object. 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 mounting.

Always wear approved protective
gloves.

Use anti--slip and stable boots.

Only use non--metallic, flexible
cutting attachments, i.e. trimmer
heads with trimmer line.

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545186870 Rev. 2 4/30/09

CONTENTS

Contents

KEY TO SYMBOLS

Symbols 2.........................

CONTENTS

Contents 3........................

Note the following before starting 3....

WHAT IS WHAT?

What is what? 4...................

GENERAL SAFETY PRECAUTIONS

Important 5........................

Personal protective equipment 5......

Machine’s safety equipment 6........

Cutting equipment 8.................

ASSEMBLY

Fitting the J--handle 10...............

Assembling and dismantling the

two--piece shaft 10...................

Fitting the harness and harness clamp 10

Fitting blades and trimmer heads 11....

Fitting a blade guard, grass blade and

grass cutter 12......................

Fitting the trimmer guard and

trimmer head 12.....................

FUEL HANDLING

Fuel safety 13.......................

Fuel 13............................

Fuelling 14.........................

STARTING AND STOPPING

Check before starting 15..............

Starting and stopping 15..............

WORKING TECHNIQUES

General working instructions 17........

MAINTENANCE

Carburetor 20.......................

Muffler 20..........................

Spark plug 21.......................

Two--piece shaft 21..................

Air filter 21..........................

Bevel gear 22.......................

Sharpening grass cutters and grass

blades 22..........................

Maintenance schedule 23.............

TECHNICAL DATA

Technical data 24....................

EC--declaration of conformity

(Applies to Europe only) 25............

Note the following before
starting:

Please read the operator’s manual carefully.

Jonsered has a policy of continuous product
development and therefore reserves the right
to modify the design and appearance of
products without prior notice.

WARNING: A clearing saw,

brushcutter or trimmer can be
dangerous if used incorrectly or
carelessly, and can cause serious
or fatal injury to the operator or
others. It is extremely important
that you read and understand the
contents of this operator’s manual.

WARNING: Under no circum-

stances may the design of the
machine be modified without the
permissionof 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.

WARNING: Long--term exposure

to noise can result in permanent
hearing impairment. So always use
approved hearing protection.

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545186870 Rev. 2 4/30/09

WHAT IS WHAT?

1. Trimmer head 16. Air filter cover

2. Grease filler cap 17. Handle adjustment

3. Bevel gear 18. Locking nut

4. Cutting attachment guard 19. Support flange

5. Shaft 20. Support cup

6. Loop handle 21. Blade (not included)

7. Throttle control 22. Drive disc

8. Stop switch 23. Socket spanner

9. Throttle lock--out 24. Transport guard

10. Harness clamp 25. Hex wrench

11. Cylinder cover 26. Locking pin

12. Starter handle 27. Harness

13. Fuel tank 28. J--handle

14. Choke control 29. Shaft coupling

15. Primer bulb 30. Operator’s manual

What is what?

5

2

9

10

7

16

22

23

25

1

3

8

11

15

13

14

6

12

17

4

4

4

27

1

18

19

20

21

22

29

30

28

26

24

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545186870 Rev. 2 4/30/09

GENERAL SAFETY PRECAUTIONS

IMPORTANT!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.

HELMET

A helmet should be worn if the brush being
cleared is taller than 2 metres.

HEARING PROTECTION

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 EN
166 in EU countries.

GLOVES

Gloves should be worn when necessary,
e.g., when fitting cutting attachments.

BOOTS

Wear anti--slip and stable boots.

Personal protective equipment

WARNING: Listen out for warn-

ing signals or shouts when you are
wearing hearing protection. Always
remove your hearing protection as
soon as the engine stops.

Important

IMPORTANT! The machine is only designed

for trimming grass, grass clearing and/or
forestry clearing.
The only accessories you can operate with
this engine unit are the cutting attachments we
recommend in the section on T echnical 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.
Never use the machine in extreme weather
conditions such as severe cold, very hot and/
or humid climates.
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 and guards must be fitted before
starting. Make sure the spark plug cap and
lead are not damaged. Otherwise you could
get an 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 15 metres.

WARNING: Never allow children

to use or be in the vicinity of the
machine. As the machine is equipped
withaspring--loadedstopswitchand
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 . Therefo re remove the spark plug
cap when the machine is not under
close supervision.

WARNING: Using an incorrect

cutting attachment or an incorrectly
filed blade can increase the risk of
accidents.

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545186870 Rev. 2 4/30/09

GENERAL SAFETY PRECAUTIONS

CLOTHING

Wear clothes made of a strong fabric and
avoid loose clothing that can catch on
shrubs and branches. Always wear heavy,
long pants. Do not wear jewelry, shorts
sandals or go barefoot. Secure hair so it is
above shoulder level.

FIRST AID KIT

A first aid kit should be carried by opera­tors of clearing saws, brushcutters or trim­mers.

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.
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.

Throttle lock--out

The throttle lock--out is designed to prevent
accidental operation of the throttle control.
When you press the lock--out (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--out 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.

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.

WARNING: Never use a machine

that has faulty safety equipment!
Follow the control, maintenance
and service instructions described
in this section. If your machine fails
any of these checks contact your
service agent to get it repaired.

Make sure the throttle control is locked at
the idle setting when the throttle lock--out is
released.

Press the throttle lock--out and make sure it
returns to its original position when you re­lease it.

Check that the throttle control and throttle
lock--out move freely and that the return
springs work properly.

See instructions under the heading Start.
Start the machine and apply full throttle.
Release the throttle and check that the
cutting attachment stops and remains at a
standstill. If the cutting attachment rotates
with the throttle in the idle position then the
carburettor idle setting must be checked.
See instructions under the heading
Maintenance.

A

B

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545186870 Rev. 2 4/30/09

GENERAL SAFETY PRECAUTIONS

Stop switch

Make sure the engine stops when you push
and hold the stop switch.

Cutting attachment guard

This guard is intended to prevent loose
objects from being thrown towards the
operator. The guard also protects the
operator from accidental contact with the
cutting attachment.

Check that the guard is undamaged and not
cracked. Replace the guard if it has been
exposed to impact or is cracked.

Always use the recommended guard for the
cutting attachment you are using. See the
“Technical data” section.

Use of incorrectly wound trimmer line or an
incorrect cutting attachment increases the
level of vibration.

WARNING: Never use a cutting

attachment without an approved
guard. See the section on “Technical
data”. If an incorrect or faulty guard
is fitted this can cause serious
personal injury.

WARNING: Overexposure to

vibration can lead to circulatory
damage or nerve damage in people
whohaveimpairedcirculation.
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 color or condition.
These symptoms normally appear
in the fingers, hands or wrists. The
risk increases at low temperatures.

Muffler

The muffler is designed to reduce the noise
level and to direct the exhaust gases away
from the operator.
CAUTION! Muffler is fitted with a catalytic
convertic designed to reduce harmful ex­haust gases.

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.

Muffler bolts

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: Mufflers fitted with

catalytic converters get very hot
duringuseandremainsoforsome
time after stopping. This also applies
at idle speed. Contact can result in
burns to the skin. Remember the risk
of fire!

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545186870 Rev. 2 4/30/09

GENERAL SAFETY PRECAUTIONS

WARNING: Bear in mind that:

Engine exhaust fumes contain car­bon monoxide, which can cause
carbon monoxide poisoning. For
this reason you should not start or
run the machine indoors, or any­where that is poorly ventilated.
The exhaust fumes from the engine
are hot and may contain sparks
which can start a fire. Never start
the machine indoors or near com­bustible material!

Locking nut

A locking nut is used to secure some types
of cutting attachment.

When fitting, tighten the nut in the opposite
direction to the direction of rotation of the
cutting attachment. Toremove it, undo the
nut in the same direction as the cutting at­tachment rotates. (CAUTION! The nut has
a left--hand thread.) Tighten the nut using
the socket spanner.

The nylon lining inside the locking nut must
not be so worn that you can turn it by
hand. The lining should offer a resistance
of at least 1.5 Nm. The nut should be re­placed after it has been put on approx. 10
times.

Cutting equipment

This section describes how to choose and
maintain your cutting equipment in order to:

S Reduce the risk of blade thrust.
S Obtain maximum cutting performance.
S Extend the life of cutting equipment.

IMPORTANT!

Only use cutting attachments with the guards
we recommend! See the section on
“T echnical data”.
Refer to the instructions for the cutting attach­ment to check the correct way to load the
trimmer line and the correct line diameter.
Keep the teeth of the blade correctly sharp­ened! Follow our recommendations. Also re­fer to the instructions on the blade packaging.
Maintain the correct blade setting! Follow our
instructions and use the recommended file
gauge.

WARNING: Always stop the en-

gine 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
lead from the spark plug before
you start to work on it.

WARNING: Using an incorrect

cutting attachment or an incorrect­ly sharpened blade increases the
risk of kickback.

Cutting equipment

Grass blades and grass cutters are in­tended for cutting coarse grass.

A trimmer head is intended for trimming
grass.

General rules

Only use cutting attachments with the
guards we recommend! See the section on
Technical data.

Keep the teeth of the blade correctly sharp­ened! Follow our instructions and use the
recommended file gauge. An incorrectly
sharpened or damaged blade increases the
risk o

f

accidents.

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545186870 Rev. 2 4/30/09

GENERAL SAFETY PRECAUTIONS

Check the cutting attachment for damage
or cracks. A damaged cutting attachment
should always be replaced.

Sharpening grass cutters and
grass blades

S See the cutting attachment packaging for

correct sharpening instructions. Sharpen
blades and cutters using a single--cut flatfile.

S Sharpen all edges equally to maintain the

balance of the blade.

WARNING: Always discard a

blade that is bent, twisted, cracked,
broken or damaged in any other
way. Never attempt to straighten
a twisted blade so that it can be re­used. Only use original blades of
the specified type.

Trimmer head

S Only use the recommended cutting at-

tachments. See the section on “Technical
data”.

IMPORTANT!

Always ensure the trimmer line is wound
tightly and evenly around the drum, other­wise the machine will generate harmful
vibration.

S Smaller machines generally require small

trimmer heads and vice versa. This is be­cause when clearing using trimmer line
the engine must throw out the trimmer
line radially from the trimmer head and
overcome the resistance of the grass
being cleared.

S The length of the trimmer line is also im-

portant. A longer trimmer line requires
greater engine power than a shorter
trimmer line of the same diameter.

S Make sure that the cutter on the trimmer

guard is intact. This is used to cut the
trimmer line to the correct length.

S To increase the life of the trimmer line 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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545186870 Rev. 2 4/30/09

ASSEMBLY

Assembling and dismantling
thetwo--pieceshaft

Assembly:

S Loosen the coupling by turning the knob.

S Align the tab of the attachment (A) with

the arrow on the coupling (B).

NOTE: Make sure unit is assembled cor-

rectly as shown in this manual.

Fitting the J-handle

S Clip the loop handle onto the shaft.

Note that the loop handle must be fitted
between the arrows on the shaft.

S Slide the spacer into the slot in the loop

handle.

S Fit the nut, knob and screw. Do not over-

tighten.

S Attach the J--handle to the loop handle

using the three screws as shown.

S Make a final adjustment of the handle to a

comfortable working position. Tighten the
bolt/knob.

WARNING: Only grass blades/

grass cutters or trimmer heads/plastic
blades may be used when the
J--handleisfitted.Sawbladesmust
never be used with the J--handle.

S Push the attachment into the coupling until

the attachment snaps into place.

S Before using the unit, tighten the knob se-

curely.

B

A

Dismantling:

S Loosen the coupling by turning the knob

(at least three times).

S Push and hold the button (C). While

securely holding the engine end, pull the
attachment straight out of the coupling.

C

Fitting the harness

Proper harness and handlebar adjust­ments must be made with the engine com­pletely stopped before using unit.

WARNING: When using a

brushcutter, it must always be
hooked securely to the harness.
Otherwise, you will be unable to
control the brushcutter safely.
This can result in injury to yourself
or others.

ENGINE

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545186870 Rev. 2 4/30/09

ASSEMBLY

Adjustingthe harness

S Insert your right arm and head through

the harness and allow it to rest on your
left shoulder.Make sure the harness
hook is to the right side of your waist.

NOTE: A one-half twist is built in the har-

ness to allow the harness to rest flat on the
shoulder.
S Adjust the harness, allowing the hook to

be about 6 inches (15 cm) below the
waist.

S Fasten the harness to the harness clamp

on the shaft and lift the unit to the operat­ing position.

S Put on the harness. Now make a final

adjustment so that the unit is in a com­fortable working position when it hangs
from the harness.

NOTE: It may be necessary to relocate

the harness clamp on the shaft for proper
balancing of unit.

S Insert two screws into the screw holes.
S Secure harness clamp by tightening

screws with a hex wrench.

Correct height

Adjust the harness so that the cutting at­tachment is parallel to the ground.

Fitting the harness clamp

S Place the upper harness clamp over the

shaft and position the lower harness
clamp under the shaft. Align the upper
and lower clamp screw holes. Clamp
must be fitted above the arrow on the
shaft (see illustration).

Correct balance

Let the cutting attachment rest lightly on
the ground. If you use a grass blade, it
should balance about 4 inches (10 cm)
above the ground to prevent contact with
stones and the like. Adjust the position of
the harness clamp to balance the unit cor­rectly.

Fitting blades and trimmer

heads

S When fitting the cutting attachment it is

extremely important that the raised section
on the drive disc/support flange engages
correctly in the centre hole of the cutting
attachment. If the cutting attachment is
fitted incorrectly it can result in serious and/
or fatal personal injury.

WARNING: Never use a cutting

attachment without an approved
guard. See the section on Techni­cal data. If an incorrect or faulty
guard is fitted this can cause seri­ous personal injury.

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545186870 Rev. 2 4/30/09

ASSEMBLY

Fitting a blade guard, grass
blade and grass cutter

S Hook the blade guard/combination guard

(A) onto the fitting on the shaft and secure
with the bolt.
CAUTION! Use the recommended blade
guard. See the Technical data section.

S Fit the drive disc (B) on the output shaft.
S Turn the blade shaft until one of the

holes in the drive disc aligns with the
corresponding hole in the gear housing.

S Insert the locking pin (C) in the hole to

lock the shaft.

S Place the blade (D), support cup (E) and

support flange (F) on the output shaft.

S Fit the nut (G). The nut must be tight-

ened to a torque of 35--50 Nm (3.5--5
kpm). Use the socket spanner in the tool
kit. Hold the shaft of the spanner as
close to the blade guard as possible. T o
tighten the nut, turn the spanner in the
opposite direction to the direction of rota­tion (CAUTION! left--hand thread).

Fitting the trimmer guard and
trimmer head

S Fit the correct trimmer guard (A) for use

with the trimmer head. Hook the trimmer
guard/combination guard onto the fitting
on the shaft and secure with the bolt (D).

S Fit the drive disc (B) on the output shaft.
S Turn the shaft until one of the holes in the

drive disc aligns with the corresponding
hole in the gear housing.

S Insert the locking pin (C) in the hole to

lock the shaft.

S Screw on the trimmer head (H) in the op-

posite direction to the direction of rota­tion.

D

A

B
C

A

H

S To dismantle, follow the instructions in

the reverse order.

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545186870 Rev. 2 4/30/09

FUEL HANDLING

Fuel safety

Never start the machine:

1. If you have spilled fuel on it. Wipe off the
spillage and allow remaining fuel to evapo­rate.

2. If you have spilled fuel on yourself or your
clothes, change your clothes. Wash any
part of your body that has come in contact
with fuel. Use soap and water.

3. If the machine is leaking fuel. Check regu­larly for leaks from the fuel cap and fuel
lines.

Tr ansport and storage

S 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.

S When storing and transporting fuel al-

ways use approved containers intended
for this purpose.

S When storing the machine for long peri-

ods the fuel tank must be emptied. Con­tact your local petrol station to find out
where to dispose of excess fuel.

S Ensure the machine is cleaned and that

a complete service is carried out before
long--term storage.

S The transport guard must always be

fitted to the cutting attachment when the
machine is being transported or in stor­age.

S 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.

Fuel

CAUTION! The machine is equipped with a

two- -stroke engine and must always be 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.

Petrol

CAUTION! Always use a good quality pet-

rol/oil mixture (at least 90 octane).
Use low--emission petrol, also known as
alkylate petrol, if it is available.

S The lowest octane recommended is 90.

If you run the engine on a lower octane
than 90, it can result in knocking. This
gives rise to a high engine temperature,
which can result in serious engine damage.

S When working at continuous high revs, a

higher octane rating is recommended.

Two- -stroke oil

S For best results and performance, use

JONSERED two--stroke oil, which is
specially formulated for our two--stroke
engines. Mixture 1:50 (2%).

S If JONSERED two- -stroke oil is not avail-

able, you may use another two-stroke oil of
good quality that is intended for air cooled
engines. Contact your dealer when select­ing an oil. Mixing ratio 1:33 (3%).

S Never use two--stroke oil intended for

water--cooled outboard engines,
sometimes referred to as outboard oil.

S Never use oil intended for four--stroke

engines.

WARNING: Take care when han-

dling fuel. Bear in mind the risk of
fire, explosion and inhaling fumes.

50,100,15
10 0,20 0,30
15 0,30 0,45
20 0,40 0,60

Petrol,
litre

Two--stroke oil, litre

2% (1:50) 3% (1:33)

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.

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545186870 Rev. 2 4/30/09

FUEL HANDLING

S Always start by flling 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.

S Mix (shake) the fuel mixture thoroughly

before filling the machine’s fuel tank.

S Do not mix more than one month’s sup-

ply of fuel at a time.

S If the machine is not used for some time,

the fuel tank should be emptied and
cleaned.

WARNING: The catalytic con-

verter 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
vapors.

Fuelling

WARNING: Ta king the following

precautions, will lessen the risk of
fire:
Do not smoke or place hot objects
near fuel.
Always shut off the engine before
refueling.
Always stop the engine and let it
cool for a few minutes before refu­elling.
When refueling, open the fuel cap
slowly so that any excess pressure
is released gently.
Tighten the fuel cap carefully after
refueling.
Always move the machine away
from the refueling area before
starting.

Min. 3 m

Mix

i

ng

S Always mix the petrol and oil in a clean

container intended for fuel.

S Clean the area around the fuel cap.

Contamination in the tank can cause
operating problems.

S Ensure that the fuel is well mixed by shak-

ing the container before filling the tank.

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545186870 Rev. 2 4/30/09

STARTING AND STOPPING

Check before starting

S Check the blade to ensure that no cracks

have formed at the bottom of the teeth or
by the centre hole. The most common rea­son why cracks are formed is that sharp
corners have been formed at the bottom of
the teeth while sharpening or that the blade
has been used with dull teeth. Discard a
blade if cracks are found.

S Check that the support flange is not

cracked due to fatigue or due to being
tightened too much. Discard the support
flange if it is cracked.

S Ensure the locking nut has not lost its cap-

tive force. The nut lock should have a
locking force of at least 1.5 Nm. The tight­ening torque of the locking nut should be
35--50 Nm.

S 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.

S Never use the machine without a guard

nor with a defective guard.

S All covers must be correctly fitted and un-

damaged before you start the machine.

Cold engine

Primer bulb: Press the primer bulb 10

times until fuel begins to fill the bulb. The
primer bulb need not be completely filled.

Choke: Move the blue engine choke lever
over to the closed position.

Starting

Hold the body of the machine on the
ground using your left hand (CAUTION!
Not with your foot!).
Firmly grip the starter rope handle with
your right hand. DO NOT squeeze
throttle trigger. Slowly pull out the cord
until you feel some resistance (the starter
pawls grip); then quickly and powerfully
pull the cord.

Never wrap the starter cord around
your hand.

Repeat pulling the cord until the engine
attempts to start. Move the blue engine
choke lever to the ½ position. Pull starter
rope until engine runs. Move the blue en­gine choke lever to the opened position.

WARNING: The complete clutch,

clutch cover, and shaft must be
fitted before the machine is started,
otherwise parts could come loose
and cause personal injury.
Always move the machine away
from the refueling area before
starting. Place the machine on a
flat surface. Ensure the cutting at­tachment cannot come into contact
with any object.
Make sure no unauthorized
persons are in the working area,
otherwise there is a risk of serious
personal injury. The safety
distance is 15 meters.

Starting and stopping

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545186870 Rev. 2 4/30/09

STARTING AND STOPPING

Warmengine

With a warm engine, move the blue engine
choke lever to the ½ position. Pull starter
rope until engine runs. Move the blue en­gine choke lever to the opened position.

CAUTION!

Do not put any part of your body in marked
area. Contact can result in burns to the
skin, or electrical shock if the spark plug
cap has been damaged. Always use
gloves. Do not use a machine with dam­aged spark plug cap.

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.

NOTE: If engine dies, return blue engine

choke lever to the closed position and
repeat starting steps.

Stopping

Stop the engine by pushing and holding
the stop switch in the STOP position until
the engine stops.

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.

WARNING: Whentheengineis

started with the choke in the closed
position the cutting attachment will
start to rotate immediately.

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545186870 Rev. 2 4/30/09

WORKING TECHNIQUES

General working instructions

IMPORTANT!

This section describ es the basic safet y pre­cautions for working with trimmers. If you
encounter a situation where you are uncer­tain how to proceed you should ask an ex­pert. Contact your servicing dealer.
Avoid all usage which you consider to be
beyond your capability.
You must understand the difference between
forestry clearing, grass clearing and grass
trimming before use.

Basic safety rules

1. Look around you:

S To ensure that people, animals or other

things cannot affect your control of the
machine.

S 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.

S CAUTION! Do not use the machine

unless you are able to call for help in
the event of an accident.

2. 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.

3. 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.

4. Switch off the engine before moving to
another area. Fit the transport guard before
carrying or transporting the equipment any
distance.

5. Never put the machine down with the engine
running or while the cutting attachment is
rotating.

WARNING: Sometimes branches

or grass get caught between the
guard and cutting attachment.
Always stop the engine before
cleaning.

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
burned 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
safetyzoneof15m.Stopthema­chine immediately if anyone ap­proaches. Never swing the ma­chine around without first checking
behind you to make sure noone is
within the safety zone.

TheABC of clearing

S Always use the correct equipment.
S Make sure the equipment is well adjusted.
S Follow the safety precautions.
S Organise your work carefully.
S Always use full throttle when starting to cut

with the blade.

S Always use sharp blades.
S Avoid stones.

Basic working techniques

S 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.

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545186870 Rev. 2 4/30/09

WORKING TECHNIQUES

Clearing

S The clearing technique removes all un-

wanted vegetation. Keep the trimmer
head just above the ground and tilt it. Let
the end of the trimmer line strike the
ground around trees, posts, statues and
the like. CAUTION! This technique
increases the wear on the trimmer line.

S The trimmer line 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.

Grass trimming with a trimmer head

Trimming

S Hold the trimmer head just above the ground

at an angle. It is the end of the trimmer line
that does the work. Let the trimmer line work
at its own pace. Never press the trimmer
lineintotheareatobecut.

S The trimmer line 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.

S Reduce the risk of damaging plants by

shortening the trimmer line to 10--12 cm and
reducing the engine speed.

S When trimmingyou should use less than

full throttle so that the trimmer line lasts
longer and to reduce the wear on the
trimmer head.

Grass clearing using a grass blade

S Grass blades and grass cutters must not be

used on woody stems.

S A grass blade is used for all types of tall or

coarse grass.

S Thegrassiscutdownwithasideways,

swinging movement, where the movement
from right- -to- -left is the clearing stroke and
the movement from left--to- -right is the return
stroke. Let the left--hand side of the blade
(between 8 and 12 o’clock) do the cutting.

S If the blade is angled to the left when clear-

ing grass, the grass will collect in a line,
which makes it easier to collect, e.g. by
raking.

S Try to work rhythmically. Stand firmly with

your feet apart. Move forward after the re­turn stroke and stand firmly again.

S Let the support cup rest lightly against the

ground. It is used to protect the blade from
hitting the ground.

S Reduce the risk of material wrapping

around the blade by following these in­structions:

S Always work at full throttle.
S Avoid the previously cut material during

the return stroke.

S Stop the engine, unclip the harness and

place the machine on the ground before
you start to collect the cut
material.

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545186870 Rev. 2 4/30/09

WORKING TECHNIQUES

Sweeping

S The fan effect of the rotating line can be

used for quick and easy clearing up.
Hold the trimmer line parallel to and
above the area to be swept and move
the tool to and fro.

S When cutting and sweeping you should

use full throttle to obtain the best results.

Cutting

S The trimmer is ideal for cutting grass that

is difficult to reach using a normal lawn
mower. Keep the trimmer line parallel to
the ground when cutting. Avoid pressing
the trimmer head against the ground as
this can ruin the lawn and damage the
tool.

S Do not allow the trimmer head to con--

stantly come into contact with the ground
during normal cutting. Constant contact
of this type can cause damage and wear
to the trimmer head.

WARNING: Neither the operator

of the machine nor anyone else may
attempt to remove the cut material
while the engine is running or the
trimmer line is rotating, as this can
result in serious injury. Stop the
engine and trimmer head before you
remove material that has wound
around the drive 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 burned if you touch it.

WARNING: Watch out for thrown

objects. Always wear eye protection.
Never lean over the cutting attach­ment guard. Stones, rubbish, etc.
canbethrownupintotheeyes
causing blindness or serious injury.
Keep unauthorized persons at a dis­tance. Children, animals, onlookers
and helpers should be kept outside
thesafetyzoneof15m.
Stopthemachineimmediatelyif
anyone approaches.

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545186870 Rev. 2 4/30/09

MAINTENANCE

Carburetor

Y our Jonsered 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. T oensure that it continues to run
at peak performance and to minimize harm­ful exhaust emissions after the run--in peri­od, ask your servicing dealer to adjust your
carburetor.

The owner is responsible

f

or the perfor­mance of all required maintenance as
defined in the operator’s manual.

WARNING: The complete clutch,

clutch cover, and shaft must be
fitted before the machine is started,
otherwise parts could come loose
and cause personal injury.

Function

S The carburetor governs the engine’s

speed via the throttle control. Air and fuel
are mixed in the carburetor.

S 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 counterclockwise gives a lower
idle speed.

Basic setting

S The basic carburetor settings are ad-

justed during testing at the factory. Fine
adjustment should be carried out by a
skilled technician.

Rec. idle speed:

See “Technical data” section.

Recommended max. speed:

See “Technical data” section.

Fine adjustment of the idle speed--T

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 counter­clockwise 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.

CAUTION! If the cutting attachment rotates
when the engine is idling the idle adjustment
screw T should be turned counterclockwise
until the cutting attachment stops.

Idle Speed
Screw--T

WARNING: If the idle speed can-

not be adjusted so that the cutting
attachment stops, contact your ser­vicing dealer. Do not use the ma­chine until it has been correctly ad­justed or repaired.

Unit/Maintenance Safety

Disconnect the spark plug before perform­ing maintenance, except carburetor adjust­ments.

Muffler

CAUTION! Muffler is fitted with a catalytic

converter designed to reduce harmful ex­haust gases.

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.
Mufflers are equipped with a special spark
arrestor mesh. Youshould clean the mesh
at least once a month. This is best done
with a wire brush. If the mesh is damaged
it should be replaced. Ifthemeshisfre­quently 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.

Muffler bolts

CAUTION! Never use a machine that has
a faulty or loose muffler. Ensure the muffler
bolts are tight.

Spark arrestor mesh

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545186870 Rev. 2 4/30/09

MAINTENANCE

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:

Engine exhaust fumes contain car­bon monoxide, which can cause
carbon monoxide poisoning. For
this reason you should not start or
run the machine indoors, or any­where that is poorly ventilated.
The exhaust fumes from the engine
are hot and may contain sparks
which can start a fire. Never start
the machine indoors or near com­bustible material!

Spark plug

The spark plug condition is influenced by:

S Incorrect carburetor adjustment.
S An incorrect fuel mixture (too much or in-

correct type of oil).
S 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 mm. 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.

0,6 mm

Air filter

The air filter must be regularly cleaned to
remove dust and dirt in order to avoid:

S Carburetor malfunctions
S Starting problems
S Loss of engine power
S Unnecessary wear to engine parts
S 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.
Rinse thoroughly. 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.

Two--piece shaft

The drive shaft end in the lower shaft
should be lubricated with grease every 30
hours. There is a risk that the drive shaft
ends (splined coupling) will seize if they
are not lubricated regularly.

WARNING: Mufflers fitted with

catalytic converters get very hot
duringuseandremainsoforsome
time after stopping. This also applies
at idle speed. Contact can result in
burns to the skin. Remember the risk
of fire!

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MAINTENANCE

Sharpening grass cutters and
grass blades

S See the cutting attachment packaging for

correct sharpening instructions.

S Sharpen blades and cutters using a

single--cut flat file.

S Sharpen all edges equally to maintain the

balance of the blade.

WARNING: Always discard a

blade that is bent, twisted, cracked,
broken or damaged in any other
way. Never attempt to straighten a
twisted blade so that it can be re­used. Only use original blades of the
specified type.

WARNING: Always stop the en-

gine 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.

Bevel gear

The bevel gear is filled with the right quan­tity of grease at the factory. However, be­fore using the machine you should check
that the bevel gear is filled three--quarters
full with grease. Use JONSERED special
grease.

The grease in the bevel gear does not nor­mally need to be changed except if repairs
are carried out.

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545186870 Rev. 2 4/30/09

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.

Maintenance

Daily
Maintenance

Weekly
Maintenance

Monthly
Maintenance

Clean the outside of the machine.
Make sure the throttle trigger lock and the

throttle function correctly from a safety point
of view.

Check that the stop switch works correctly.
Check that the cutting attachment does not

rotate at idle.
Clean the air filter. Replace if necessary.
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 that the locking nut of the cutting
equipment is tightened correctly.

Check that nuts and screws are tight.
Check that there are no fuel leaks from the

engine, tank or fuel lines.
Check the starter and starter cord.
Clean the outside of the spark plug. Re-

move 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 outside of the carburetor and the
space around it.

Check that the bevel gear is filled three-­quarters full with lubricant. Fill if necessary
using special grease.

Check the fuel filter from contamination and
the fuel hose from cracks or other defects.
Replace if necessary.

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.

Clean or replace the spark arrestor mesh
on the muffler.

X

X
X

X
X

X

X

X
X

X

X

X

X

X
X

X

X

X

X

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545186870 Rev. 2 4/30/09

TECHNICAL DATA

Technical data

GC2128C

Engine

Cylinder displacement, cm

3

28
Cylinder bore, mm 35
Stroke, mm 28,7
Idle speed, rpm 2800--3200
Recommended max. fast idle speed, rpm 11000
Speed of output shaft, rpm 8000
Max. engine output, acc. to ISO 8893, kW 0,8
Catalytic converter muffler Y es
Speed--regulated ignition system Yes

Ignition system

Manufacturer/type of ignition system Walbro/CD
Spark plug Champion RCJ--8Y
Electrode gap, mm 0,6

Fuel and lubrication system

Manufacturer/type of carburetor Zama
Zama
Fuel tank capacity, litre 0,4

Weight

Weight without fuel, cutting attachment and guard, kg 5,0

Noise emissions

(see note 1)
Sound power level, measured dB(A) 110
Sound power level, guaranteed L

WA

dB(A) 114

Noise levels

(see note 2)
Equivalent noise pressure level at the operators’ ear,
measured according to EN/ISO 11806 and ISO 22868,
dB(A), min./max. 93/96

Vibration levels

Vibration levels at handles, measured according to
EN/ISO 11806 and ISO 22867
FRONT HANDLE
Idling, m/s

2

, min./max. 2,9/4,7

Racing, m/s

2

, min./max. 3,1/6,2
REAR HANDLE
Idling, m/s

2

, min./max. 1,9/2,6

Racing, m/s

2

, min./max. 5,5/8,4
Note 1: Noise emissions in the environment measured as sound power (L

WA

) 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.

NOTE! The noise pressure level at operator’s ear and vibrations on the handles are mea­sured with all the approved cutting attachments for the machine. The table indicates the
lowest and highest values.

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TECHNICAL DATA

Model GC2128C (M10 LH arbor shaft thread) -- Centre hole in blades/cutters, ∅ 25,4 mm
Approved accessories Type Cutting attachment / guard, part. no.

Grass blade/grass cutter Grass 255--4 1 inch 504 00 13--03 / 545 081 703

(∅ 250 4--teeth)
Trimmer head T25 537 33 83--02 / 545 081 703
Plastic blades Tricut 300 mm 531 00 38--11 / 545 081 703
Support cup Fixed --

Attachments Part. no.

Cultivator attachment with shaft 952 711 907
Edger attachment with shaft 952 711 908
Blower attachment with shaft 952 711 911
Pruner attachment with shaft 952 711 910

DECLARATION OF CONFORMITY

EC Declaration of Conformity (Only applies to Europe)

We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: [phone], as authorised
representative in the Community, declare that thegrass trimmer modelJonsered GC2128C
from serial numbers 2009--031N00001 and onwards (the year is clearly stated on the rating
plate, followed by the serial number), comply with the requirements of the COUNCIL’S
DIRECTIVES:

of 22 June 1998 “relating to machinery” 98/37/EC, annex IIA;
of15 December 2004 “relatingtoelectromagneticcompatibility”2004/108/EC,andapplicable

supplements; and
of 8May2000“relatingtothenoise emissions in the environment” in accordance with Annex

Vof2000/14/EC. The measured sound power is 110 dB(A), the guaranteed sound power is
114 dB(A). The cutting width is 43 cm.

The following standards have been applied:EN12100--1:2003, EN 12100--2:2003, EN ISO

11806:1997 and CISPR 12:2005.
SMP, The Swedish Machinery Testing Institute, Fyrisborgsgatan 3 S--754 50 Uppsala,

Sweden, has carried out voluntary type approval. The certificate(s) are numbered:
SEC/09/1291.

09--01--31

Ronnie E. Goldman, Director of Engineering
Handheld Consumer Products

English--- 26

545186870 Rev. 2 4/30/09

Trimmer Head Line Loading Instructions

20i

10i

3m

6m

1

23

45

6

78

9

English--- 27

545186870 Rev. 2 4/30/09

Plastic Blades (Tri Cut)

12

3

4

5

6

7

8