Jonsered CS 2147 User Manual

CS 2147 CS 2152

Operator

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

′

s manual

KEY TO SYMBOLS

Key to symbols

WARNING! Chain saws 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 carefully
and make sure you understand the
instructions before using the machine.

Always wear:

• Approved protective helmet

• Approved hearing protection

• Protective goggles or a visor

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 chapter
Technical data and on label.

If your machine bears this symbol it is
equipped with a catalytic converter.

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

Switch off the engine by moving the stop
switch to the STOP position before carrying
out any checks or maintenance.

Always wear approved protective gloves.

Regular cleaning is required.

Visual check.

Protective goggles or a visor must be worn.

Refuelling.

Filling with oil and adjusting oil flow.

If your machine bears this symbol it is
equipped with carburettor heating.

English

2 –

CONTENTS

Contents Before using a new chain saw

KEY TO SYMBOLS

Key to symbols .............................................................. 2

CONTENTS

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

Before using a new chain saw ...................................... 3

SAFETY INSTRUCTIONS

Personal protective equipment ...................................... 4

Machine
Checking, maintaining and servicing the machine

safety equipment ........................................................... 7

Cutting equipment ......................................................... 9

How to avoid kickback ................................................... 15

General safety precautions ........................................... 16

General working instructions ........................................ 18

WHAT IS WHAT?

What is what on the chain saw? ................................... 24

ASSEMBLY

Fitting the bar and chain ............................................... 25

FUEL HANDLING

Fuel ............................................................................... 26

The following applies to chain saws with catalytic

converters: .................................................................... 26

Chain oil ........................................................................ 27

Fuelling ......................................................................... 27

STARTING AND STOPPING

Starting and stopping .................................................... 28

MAINTENANCE

Carburettor .................................................................... 30

Starter ........................................................................... 31

Air filter .......................................................................... 32

Spark plug ..................................................................... 32

Muffler ........................................................................... 33

Needle bearing lubrication ............................................ 33

Adjustment of the oil pump ........................................... 33

Cooling system ............................................................. 33

Centrifugal cleaning “Turbo” .......................................... 34

Heated handles (CS 2147W, CS 2152W)...................... 34

Electrical carburettor heating (CS 2147WH, CS

2152WH)........................................................................ 34

Winter use ..................................................................... 34

Daily maintenance ........................................................ 35

Weekly maintenance ..................................................... 35

Monthly maintenance .................................................... 35

TECHNICAL DATA

Technical data ............................................................... 36

Bar and chain combinations ......................................... 37

EC-declaration of conformity ......................................... 38

′

s safety equipment ......................................... 4

′

s

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

• Check that the cutting equipment is correctly fitted and
adjusted. See instructions under the heading Assembly.

• Refuel, start the chain saw and check the carburettor
settings. See the instructions under the headings Fuel
Handling, Starting and Stopping, and Carburettor.

• Do not use the chain saw until sufficient chain oil has
reached the chain. See instructions under the heading
Lubricating cutting equipment.

IMPORTANT! If the carburettor mixture is too lean it greatly
increases the risk of engine failure. Poor maintenance of the
air filter will cause carbon build-up on the spark plug and lead
to starting difficulties. If the chain is improperly adjusted it will
cause increased wear or damage to the bar, drive sprocket
and chain.

WARNING! Under no circumstances may the
design of the machine be modified without

!

the permission of the manufacturer. Always
use genuine accessories. Non-authorized
modifications and/or accessories can result
in serious personal injury or the death of the
operator or others.

WARNING! A chain saw is a dangerous tool
if used carelessly or incorrectly and can

!

cause serious, even fatal injuries. It is very
important that you read and understand the
contents of this operator’s manual.

WARNING! The inside of muffler contain
chemicals that may be carcinogenic. Avoid

!

contact with these elements in the event of a
damaged muffler.

WARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist and

!

dust from sawdust can represent a health
risk.

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

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– 3

SAFETY INSTRUCTIONS

Personal protective equipment

WARNING! Most chain saw accidents
happen when the chain touches the

!

operator.

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.

WARNING! Long or continuous exposure to
high noise levels may cause permanent

!

hearing impairment. Always wear approved
hearing protection when operating a chain
saw.

• Protective helmet

• Hearing protection

• Protective goggles or a visor

Machine

This section describes the machine
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.

!

• Chain brake and hand guard

• Throttle lock

• Chain catcher

′′

′′

s safety equipment

′

s safety equipment, its

WARNING! Never use a machine that has
faulty safety equipment! Carry out the
inspection, maintenance and service
routines listed in this section.

• Gloves with saw protection

• Protective trousers with saw protection

• Boots with saw protection, steel toe-cap and non-slip sole

Generally clothes should be close-fitting without restricting
your freedom of movement.

• Always have a first aid kit nearby.

• Right hand guard

• Vibration damping system

• Stop switch

• Muffler

4 –

• Cutting equipment. See instructions under the heading
Cutting equipment.

English

SAFETY INSTRUCTIONS

Chain brake and hand guard

Your chain saw is equipped with a chain brake that is
designed to stop the chain immediately if you get a kickback.
The chain brake reduces the risk of accidents, but only you
can prevent them.

Take care when using your saw and make sure the kickback
zone of the bar never touches any object.

• The chain brake (A) can either be activated manually (by
your left hand) or automatically by the inertia release
mechanism (a pendulum that swings independently of the
chain saw. On most of our models the hand guard acts as
a counterweight in case of kickback).

The brake is applied when the hand guard (B) is pushed
forwards.

due to kickback, you should also apply the chain brake
manually if there is a risk of the chain accidentally hitting
anyone or anything close by.

• To release the chain brake pull the hand guard backwards,
towards the front handle.

• Kickback can be very sudden and violent. Most kickbacks
are minor and do not always activate the chain brake. If
this happens you should hold the chain saw firmly and not
let go.

This movement activates a spring-loaded mechanism that
tightens the brake band (C) around the engine drive
system (D) (clutch drum).

• The hand guard is not designed solely to activate the
chain brake. Another important feature is that it reduces
the risk of the chain hitting your left hand if you lose grip of
the front handle.

• The chain brake must be engaged when the chain saw is
started.

• The way the chain brake is activated, either manually or
automatically by the inertia release mechanism, depends
on the force of the kickback and the position of the chain
saw in relation to the object that the kickback zone of the
bar strikes.

If you get a violent kickback while the kickback zone of the
bar is farthest away from you the chain brake will be
activated by the movement of the counterweight (inertia
activated) in the kickback direction.

If the kickback is less violent or the kickback zone of the
bar is closer to you the chain brake will be activated
manually by the movement of your left hand.

• You can also use the chain brake as a temporary brake
when you change position or if you put the chain saw
down for a short time! Apart from the fact that a chain saw
with a chain brake greatly reduces the risk of accidents

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– 5

SAFETY INSTRUCTIONS

• During felling your left hand grasps the front handle in
such a way that it cannot activate the chain brake. In this
position, i.e. when your left hand is in such a position that
it cannot affect the movement of the hand guard, the chain
brake can only be activated by the inertia of the
counterweight.

• The inertia activated chain brake is a valuable feature but
there are certain factors to remember (see point above).

Throttle lock

Vibration damping system

Your machine is equipped with a vibration damping system
that is designed to minimise vibration and make operation
easier.

When you use a chain saw, vibration is generated by the
uneven contact between the chain and the wood you are
cutting.

Cutting hardwoods (most broadleaf trees) creates more
vibration than cutting softwoods (most conifers). Cutting with
cutting equipment that is blunt or faulty (wrong type or badly
sharpened) will increase the vibration level. See instructions
under the heading Cutting equipment.

The throttle lock is designed to prevent accidental operation
of the throttle control. When you press the lock (A) (i.e. when
you grasp the handle) it releases the throttle control (B). When
you release the handle the throttle control and the throttle lock
both move back to their original positions. This movement is
controlled by two independent return springs. This
arrangement means that the throttle control is automatically
locked at the idle setting.

Chain catcher

The chain catcher is designed to catch the chain if it snaps or
jumps off. This should not happen if the chain is properly
tensioned (see instructions under the heading Assembly) and
if the bar and chain are properly serviced and maintained (see
instructions under the heading General working instructions).

The machine
of vibration between the engine unit/cutting equipment and
the machine
including the cutting equipment, is insulated from the handles
by vibration damping units.

!

′

s vibration damping system reduces the transfer

′

s handle unit. The body of the chain saw,

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.

Right hand guard

Apart from protecting your hand if the chain jumps or snaps,
the right hand guard stops branches and twigs from
interfering with your grip on the rear handle.

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6 –

Stop switch

Use the stop switch to switch off the engine.

SAFETY INSTRUCTIONS

Muffler

The muffler is designed to keep noise levels to a minimum and
to direct exhaust fumes away from the user.

WARNING! 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!

In areas with a hot, dry climate there is a high risk of fires.
These areas are sometimes controlled by legislation and
requirements that among other things the muffler must be
equipped with an approved type of spark arrestor mesh.

For mufflers it is very important that you follow the instructions
on checking, maintaining and servicing your machine. See
instructions under the heading Checking, maintaining and
servicing the machine’s safety equipment.

Checking, maintaining and servicing
the machine

WARNING! All servicing and repair work on
the machine requires special training. This is

!

especially true of the machine
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.

Chain brake and hand guard

Checking brake band wear

Brush off any wood dust, resin and dirt from the chain brake
and clutch drum. Dirt and wear can impair operation of the
brake.

′′

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s safety equipment

′′

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s safety

WARNING! The muffler gets very hot in use
and remains so for a short time afterwards.

!

Do not touch the muffler if it is hot!

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

Regularly check that the brake band is at least 0.6 mm thick
at its thinnest point.

Checking the hand guard

Make sure the hand guard is not damaged and that there are
no visible defects such as cracks.

Move the hand guard forwards and back to make sure it
moves freely and that it is securely anchored to the clutch
cover.

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– 7

SAFETY INSTRUCTIONS

Checking the inertia brake release

Hold the chain saw over a stump or other firm object. Let go
of the front handle so that the bar drops towards the stump as
the chain saw rotates around the rear handle.

When the bar hits the stump the brake should be applied.

Throttle lock

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

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

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

Checking the brake trigger

Place the chain saw on firm ground and start it. Make sure the
chain does not touch the ground or any other object. See the
instructions under the heading Start and stop.

Grasp the chain saw firmly, wrapping your fingers and thumbs
around the handles.

Apply full throttle and activate the chain brake by tilting your
left wrist forward onto the hand guard. Do not let go of the
front handle. The chain should stop immediately.

• Start the chain saw and apply full throttle. Release the
throttle control and check that the chain stops and
remains stationary. If the chain rotates when the throttle
control is in the idle position you should check the
carburettor idle adjustment.

Chain catcher

Check that the chain catcher is not damaged and is firmly
attached to the body of the chain saw.

8 –

Right hand guard

Check that the right hand guard is not damaged and that there
are no visible defects, such as cracks.

English

SAFETY INSTRUCTIONS

•

Vibration damping system

Regularly check the vibration damping units for cracks or
deformation.

Make sure the vibration damping units are securely attached
to the engine unit and handle unit.

Stop switch

Start the engine and make sure the engine stops when you
move the stop switch to the stop setting.

Never use a muffler if the spark arrestor mesh is missing
or defective.

WARNING! Never use a machine with faulty
safety equipment. The machine’s safety

!

equipment must be checked and maintained
as described in this section. If your machine
fails any of these checks contact your
service agent to get it repaired.

Cutting equipment

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

• Reduce the risk of kickback.

• Reduce the risk of the chain breaking or jumping.

• Obtain maximum cutting performance.

• Extend the life of cutting equipment.

General rules

Only use cutting equipment recommended by us!

See the Technical data section.

Muffler

Never use a machine that has a faulty muffler.

Regularly check that the muffler is securely attached to the
machine.

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.

• Keep the chain’s cutting teeth properly sharpened!

Follow our instructions and use the recommended file
gauge. A damaged or badly sharpened chain increases

the risk of accidents.

• Maintain the correct raker clearance! Follow our

instructions and use the recommended raker gauge.

Too large a clearance increases the risk of kickback.

• Keep the chain properly tensioned! If the chain is slack
it is more likely to jump off and lead to increased wear on
the bar, chain and drive sprocket.

• Keep cutting equipment well lubricated and properly

maintained! A poorly lubricated chain is more likely to

break and lead to increased wear on the bar, chain and
drive sprocket.

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SAFETY INSTRUCTIONS

Cutting equipment designed to minimise kickback

WARNING! Faulty cutting equipment or the
wrong combination of bar and chain

!

increases the risk of kickback! Use only the
bar and chain combinations that we
recommend. See the Technical data section.

The only way to avoid kickback is to make sure that the
kickback zone of the bar never touches anything.

By using cutting equipment with ”built-in” kickback reduction
and keeping the chain sharp and well-maintained you can
reduce the effects of kickback.

Bar

The smaller the tip radius the smaller the kickback zone and
the lower the chance of kickback.

Chain

Some terms that describe the bar and chain

When the cutting equipment supplied with your saw becomes
worn or damaged you must replace it with one of the bars and
chains recommended by us. See the Technical data section.

Bar

• Length (inches/cm)

• Number of teeth on bar tip sprocket (T). Small number =
small tip radius = low risk of kickback.

• Chain pitch (inches). The spacing between the drive links
of the chain must match the spacing of the teeth on the bar
tip sprocket and drive sprocket.

• Number of drive links. The number of drive links is
determined by the length of the bar, the chain pitch and
the number of teeth on the bar tip sprocket.

A chain is made up of a number of links, which are available
in standard and low-kickback versions.

None Standard Low-kickback

Cutting link

Drive link

Side link

Combining these links in different ways gives different
degrees of kickback reduction. In terms of kickback reduction
alone, four different types of link are available.

Level of
kickback
reduction

Low

Cutting link Drive link Side link

• Bar groove width (inches/mm). The groove in the bar must
match the width of the chain drive links.

• Chain oil hole and hole for chain tensioner. The bar must
be matched to the chain saw design.

Chain

• Chain pitch (inches)

Standard

High

Extra high

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10 –

• Drive link width (mm/inches)

SAFETY INSTRUCTIONS

• Number of drive links.

• Level of kickback reduction. The level of kickback
reduction offered by a chain is only indicated by its model
number. See the Technical data section to find the model
numbers of chains that are recommended for use with
your model of chain saw.

Sharpening your chain and adjusting raker clearance

WARNING! The risk of kickback is increased
with a badly sharpened chain!

!

General information on sharpening cutting teeth

• Never use a blunt chain. When the chain is blunt you have
to exert more pressure to force the bar through the wood
and the cuttings will be very small. If the chain is very blunt
it will not produce any cuttings at all. Wood powder would
be the only result.

• A sharp chain eats its way through the wood and produces
long, thick cuttings.

When you sharpen a cutting tooth there are five important
factors to remember.

1 Filing angle

2 Cutting angle

3 File position

4 Round file diameter

5 File depth

It is very difficult to sharpen a chain correctly without the right
equipment. We recommend that you use our file gauge. This
will help you obtain the maximum kickback reduction and
cutting performance from your chain.

• The cutting part of the chain is called the cutting link and
this consists of a cutting tooth (A) and the raker lip (B). The
cutting depth is determined by the difference in height
between the two.

See the Technical data section for information about
sharpening your chain.

WARNING! The following faults will increase
the risk of kickback considerably:

!

File angle too large

Cutting angle too small

File diameter too small

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– 11

SAFETY INSTRUCTIONS

Sharpening cutting teeth

To sharpen cutting teeth you will need a round file and a file
gauge. See the Technical data section for information on the
size of file and gauge that are recommended for the chain
fitted to your chain saw.

• Check that the chain is correctly tensioned. A slack chain
will move sideways, making it more difficult to sharpen
correctly.

• Always file cutting teeth from the inside face. Reduce the
pressure on the return stroke. File all the teeth on one side
first, then turn the chain saw over and file the teeth on the
other side.

• We recommend that you use our raker gauge to achieve
the correct clearance and bevel on the raker lip.

WARNING! The risk of kickback is increased
if the raker clearance is too large!

!

Setting the raker clearance

• Before setting the raker clearance the cutting teeth should
be newly sharpened. We recommend that you adjust the
raker clearance every third time you sharpen the chain.
NOTE! This recommendation assumes that the length of
the cutting teeth is not reduced excessively.

• To adjust the raker clearance you will need a flat file and a
raker gauge.

• File all the teeth to the same length. When the length of
the cutting teeth is reduced to 4 mm (0.16") the chain is
worn out and should be replaced.

General advice on setting raker clearance

• When you sharpen the cutting teeth you reduce the raker
clearance (=cutting depth). To maintain optimal cutting
performance you must file back the raker lip to the
recommended height.

See the Technical data section to find the raker clearance
for your particular chain.

• On a low-kickback cutting link the front edge of the raker
lip is rounded. It is very important that you maintain this
radius or bevel when you adjust the raker clearance.

• Place the gauge over the raker lip.

• Place the file over the part of the lip that protrudes through
the gauge and file off the excess. The clearance is correct
when you no longer feel any resistance as you draw the
file over the gauge.

Tensioning the chain

WARNING! A slack chain may jump off and
cause serious or even fatal injury.

!

The more you use a chain the longer it becomes. It is
therefore important to adjust the chain regularly to take up the
slack.

Check the chain tension every time you refuel. NOTE! A new
chain has a running-in period during which you should check
the tension more frequently.

The position of the chain tensioning screw on our chain saws
varies from model to model. See the What is what? section to
find out where it is on your model.

12 – English

SAFETY INSTRUCTIONS

Tension the chain as tightly as possible, but not so tight that
you cannot pull it round freely by hand.

• Undo the bar nuts that hold the clutch cover/chain brake.
Use the combination spanner. Then tighten the bar nuts
by hand as tight as you can.

• Raise the tip of the bar and stretch the chain by tightening
the chain tensioning screw using the combination
spanner. Tighten the chain until it does not sag from the
underside of the bar.

Never use waste oil! This is dangerous for yourself, the
machine and the environment.

Filling with chain oil

• All our chain saws have an automatic chain lubrication
system. On some models the oil flow is also adjustable.

• The sizes of the chain oil tank and fuel tank have been
chosen so that the engine will run out of fuel before
running out of oil. This means that you should never run
with a dry chain.

However, this safety feature requires that you use the right
sort of chain oil (if the oil is too thin it will run out before the
fuel), and that you adjust the carburettor as recommended
(a weak mixture may mean that the fuel lasts longer than
the oil) and that you also use the recommended cutting
equipment (a bar that is too long will use more chain oil).
The above conditions also apply to chain saw models with
an adjustable oil pump.

• Use the combination spanner to tighten the bar nuts while
lifting the tip of the bar at the same time. Check that you
can pull the chain round freely by hand and that it does not
sag from the underside of the bar.

Lubricating cutting equipment

WARNING! Poor lubrication of cutting
equipment may cause the chain to snap,

!

which could lead to serious, even fatal
injuries.

Chain oil

Checking chain lubrication

• Check the chain lubrication each time you refuel.

Aim the tip of the bar at a light coloured surface about 20
cm (8 inches) away. After 1 minute running at 3/4 throttle
you should see a distinct line of oil on the light surface.

If the chain lubrication is not working:

• Check that the oil channel in the bar is not obstructed.
Clean if necessary.

Chain oil must demonstrate good adhesion to the chain and
also maintain its flow characteristics regardless of whether it
is warm summer or cold winter weather.

As a chain saw manufacturer we have developed an optimal
chain oil which, with its vegetable oil base, is also
biodegradable. We recommend the use of our own oil for both
maximum chain life and to minimise environmental damage.
If our own chain oil is not available, standard chain oil is
recommended.

In areas where oil specifically for lubrication of saw chains is
unavailable, ordinary EP 90 transmission oil may be used.

• Check that the groove in the edge of the bar is clean.
Clean if necessary.

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SAFETY INSTRUCTIONS

• Check that the bar tip sprocket turns freely and that the
lubricating hole in the tip sprocket is not blocked. Clean
and lubricate if necessary.

If the chain lubrication system is still not working after carrying
out the above checks and associated measures you should
contact your service agent.

Lubricating the bar tip sprocket

Lubricate the bar tip sprocket each time you refuel. Use the
special grease gun and a good quality bearing grease.

We recommend you compare the existing chain with a new
chain to decide how badly the existing chain is worn.

When the length of the cutting teeth has worn down to only 4
mm the chain must be replaced.

Chain drive sprocket

The clutch drum is fitted with one of the following drive
sprockets:

A Spur sprocket (the chain sprocket is welded on the drum)

B Rim sprocket (replaceable)

Needle bearing lubrication

The clutch drum is fitted with one of the following drive
sprockets:

A Spur sprocket (the chain sprocket is welded on the drum)

B Rim sprocket (replaceable)

Both versions have a needle bearing on the drive shaft, which
has to be greased regularly (once a week). CAUTION! Use a
high-quality bearing grease or engine oil.

Checking wear on cutting equipment

Regularly check the degree of wear on the drive sprocket.
Replace if wear is excessive. Replace the drive sprocket
whenever you replace the chain.

Bar

Check regularly:

• Whether there are burrs on the edges of the bar. Remove
these with a file if necessary.

• Whether the groove in the bar has become badly worn.
Replace the bar if necessary.

• Whether the tip of the bar is uneven or badly worn. If a
hollow forms on the underside of the bar tip this is due to
running with a slack chain.

Check the chain daily for:

• Visible cracks in rivets and links.

• Whether the chain is stiff.

• Whether rivets and links are badly worn.

14 – English

• To prolong the life of the bar you should turn it over daily.

SAFETY INSTRUCTIONS

WARNING! Most chain saw accidents
happen when the chain touches the

!

operator.

Wear personal protective equipment. See
instructions under the heading Personal
protective equipment.

Do not tackle any job that you feel you are
not adequately trained for. See instructions
under the headings Personal protective
equipment, How to avoid kickback, Cutting
equipment and General working
instructions.

Avoid situations where there is a risk of
kickback. See instructions under the

heading Machine′′

Use the recommended protective equipment
and check its condition. See instructions
under the heading General working
instructions.

Check that all the chain saw safety features
are working. See instructions under the
headings General working instructions and
General safety precautions.

′′

s safety equipment.

Kickback only occurs if the kickback zone of the bar touches
an object.

General rules

1 If you understand what kickback is and how it happens

then you can reduce or eliminate the element of surprise.
By being prepared you reduce the risk. Kickback is usually
quite mild, but it can sometimes be very sudden and
violent.

2 Always hold the chain saw firmly with your right hand on

the rear handle and your left hand on the front handle.
Wrap your fingers and thumbs around the handles. You
should use this grip whether you are right-handed or left­handed. This grip minimises the effect of kickback and lets
you keep the chain saw under control.

Do not let go of the handles!

How to avoid kickback

WARNING! Kickback can happen very
suddenly and violently; kicking the chain

!

saw, bar and chain back at the user. If this
happens when the chain is moving it can
cause very serious, even fatal injuries. It is
vital you understand what causes kickback
and that you can avoid it by taking care and
using the right working technique.

What is kickback?

The word kickback is used to describe the sudden reaction
that causes the chain saw and bar to jump off an object when
the upper quadrant of the tip of the bar, known as the kickback
zone, touches an object.

Kickback always occurs in the cutting plane of the bar.
Normally the chain saw and bar are thrown backwards and
upwards towards the user. However, the chain saw may move
in a different direction depending on the way it was being used
when the kickback zone of the bar touched the object.

3 Most kickback accidents happen during limbing. Make

sure you are standing firmly and that there is nothing in
the way that might make you trip or lose your balance.

Lack of concentration can lead to kickback if the kickback
zone of the bar accidentally touches a branch, nearby tree
or some other object.

4 Never use the chain saw above shoulder height and try

not to cut with the tip of the bar. Never use the chain saw

one-handed!

English – 15

SAFETY INSTRUCTIONS

,

5 You must have a steady stance in order to have full control

over the chain saw. Never work standing on a ladder, in a
tree or where you do not have firm ground to stand on.

6 Always use a fast cutting speed, i.e. full throttle.

7 Take great care when you cut with the top edge of the bar,

i.e. when cutting from the underside of the object. This is
known as cutting on the push stroke. The chain tries to
push the chain saw back towards the user.

Unless the user resists this pushing force there is a risk
that the chain saw will move so far backwards that only the
kickback zone of the bar is in contact with the tree, which
will lead to a kickback.

Cutting with the bottom edge of the bar, i.e. from the top of
the object downwards, is known as cutting on the pull
stroke. In this case the chain saw pulls itself towards the
tree and the front edge of the chain saw body rests
naturally on the trunk when cutting. Cutting on the pull
stroke gives the operator better control over the chain saw
and the position of the kickback zone.

General safety precautions

• Chain saws are designed solely for cutting wood. The only
accessories you may use with this engine unit are the
combinations of bars and chains we recommend in the
Technical data section.

• 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.

WARNING! Running an engine in a confined
or badly ventilated area can result in death

!

due to asphyxiation or carbon monoxide
poisoning.

• 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.

• Never use any accessories other than those
recommended in this manual. See instructions under the
headings Cutting equipment and Technical data.

WARNING! The risk of accident is increased
if you use the wrong cutting equipment or a

!

chain that is not sharpened correctly. Using
the wrong combination of bar and chain can
increase the risk of accidents.

8 Follow the instructions on sharpening and maintaining

your bar and chain. When you replace the bar and chain
use only combinations that are recommended by us. See
instructions under the headings Cutting equipment and
Technical data.

WARNING! The risk of kickback is increased
if you use the wrong cutting equipment or a

!

chain that is not sharpened correctly. The
wrong combination of bar and chain can
increase the risk of kickback!

16 – English

Before use:

1 Check that the chain brake works correctly and is not

damaged. See the instructions under the heading
Checking the chain brake.

2 Check that the rear right hand guard is not damaged.

3 Check that the throttle lock works correctly and is not

damaged.

4 Check that the start and stop switch works correctly and is

not damaged.

SAFETY INSTRUCTIONS

5 Check that all handles are free from oil.

6 Check that the anti vibration system works and is not

damaged.

7 Check that the muffler is securely attached and not

damaged.

8 Check that all parts of the chain saw are tightened

correctly and that they are not damaged or missing.

9 Check that the chain catcher is in place and not damaged.

Starting

WARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist and

!

dust from sawdust can represent a health
risk.

• Never start a chain saw unless the bar, chain and all
covers are fitted correctly.

• The chain brake must be engaged when the chain saw is
started. See the instructions under the heading Start.
Never air drop start the chain saw. This method is
extremely dangerous, as it is easy to lose control of the
chain saw. See the instructions under the heading Start.

objects. Then grasp the starter handle with your right hand
and pull the starter cord. Never twist the starter cord

around your hand.

Fuel safety

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

WARNING! Fuel and fuel vapour are highly
flammable. Take care when handling fuel and

!

chain oil. Be aware of the risks of fire,
explosion and those associated with
inhalation.

• Never start a chain saw unless the bar, chain and clutch
cover are fitted correctly. See instructions under the
heading Assembly.

• Never start the machine indoors. Exhaust fumes can be
dangerous if inhaled.

• Observe your surroundings and make sure that there is no
risk of people or animals coming into contact with the
cutting equipment.

• Never refuel the machine while the engine is running.

• Make sure there is plenty of ventilation when refuelling or
mixing fuel (petrol and 2-stroke oil).

• Move the machine at least 3 m from the refuelling point
before starting it.

• Never start the machine:

1 If you have spilt fuel or chain oil on the machine. 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.

• Place the chain saw on the ground and hold the rear
handle down with your right foot. Grasp the front handle
firmly using your left hand. Make sure the chain saw is
steady and the chain is not touching the ground or other

English – 17

SAFETY INSTRUCTIONS

Transport and storage

• Always store the chain saw and fuel so that there is no risk
of leakages or fumes coming into contact with sparks or
naked flames from electrical equipment, electric motors,
relays/switches, boilers and the like.

• Always store fuel in an approved container designed for
that purpose.

• For longer periods of storage or for transport of the chain
saw, the fuel and chain oil tanks should be emptied. Ask
where you can dispose of waste fuel and chain oil at your
local petrol station.

• 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.

General working instructions

WARNING! This section describes basic
safety rules for using a chain saw. This

!

information is never a substitute for
professional skills and experience. If you get
into a situation where you feel unsafe, stop
and seek expert advice. Contact your chain
saw dealer, service agent or an experienced
chain saw user. Do not attempt any task that
you feel unsure of!

• Take great care when removing small branches and avoid
cutting bushes (i.e. cutting many small branches at the
same time). Small branches can be grabbed by the chain
and thrown back at you, causing serious injury.

• 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.

• Take the utmost care when cutting through branches or
logs that are in tension. A log or branch that is in tension
can suddenly spring back into its natural position before or
after you cut it. If you stand on the wrong side or start
cutting in the wrong place it may strike you or your chain
saw, so that you lose control. Both situations could cause
serious injury.

Before using a chain saw you must understand the effects of
kickback and how to avoid them. See instructions under the
heading How to avoid kickback.

Before using a chain saw you must understand the difference
between cutting with the top and bottom edges of the bar. See
instructions under the heading How to avoid kickback.

Basic safety rules

• Look around you:

- To ensure that people, animals or other things cannot
affect your control of the machine.

- To make sure that none of the above might come
within reach of your saw or be injured by falling trees.

Follow the instructions above, but do not use a chain saw in a
situation where you cannot call for help in case of an accident.

• 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.

• Before moving your chain saw switch off the engine and
lock the chain using the chain brake. Carry the chain saw
with the bar and chain pointing backwards. Fit a guard to
the bar before transporting the chain saw or carrying it for
any distance.

18 – English

SAFETY INSTRUCTIONS

• Never put a chain saw down while the engine is running
unless you have it in clear view and the chain brake is on.
Switch the engine off before leaving your chain saw for
any length of time.

Basic cutting technique

3 Make sure the chain will not strike the ground or any other

object during or after cutting.

4 Is there a risk of kickback?

WARNING! Never use a chain saw by holding
it with one hand. A chain saw is not safely

!

controlled with one hand; you can cut
yourself. Always have a secure, firm grip
around the handles with both hands.

General

• Always use full throttle when cutting!

• Reduce the speed to idle after every cut (running the
engine for too long at full throttle without any load, i.e.
without any resistance from the chain during cutting, can
lead to serious engine damage).

• Cutting from above = Cutting on the pull stroke.

• Cutting from below = Cutting on the push stroke.

Cutting on the push stroke increases the risk of kickback. See
instructions under the heading How to avoid kickback.

Terms

Cutting = General term for cutting through wood.

Limbing = Cutting branches off a felled tree.

Splitting = When the object you are cutting breaks off before
the cut is complete.

There are five important factors you should
consider before making a cut:

5 Do the conditions and surrounding terrain affect how

safely you can stand and move about?

Two factors decide whether the chain will jam or the object
that you are cutting will split: the first is how the object is
supported before and after cutting, and the second is whether
it is in tension.

In most cases you can avoid these problems by cutting in two
stages; from the top and from the bottom. You need to support
the object so that it will not trap the chain or split during
cutting.

WARNING! If the chain jams in the cut: stop
the engine! Don’t try to pull the chain saw

!

free. If you do you may be injured by the
chain when the chain saw suddenly breaks
free. Use a lever to open up the cut and free
the chain saw.

The following instructions describe how to handle the
commonest situations you are likely to encounter when using
a chain saw.

Cutting

The log is lying on the ground. There is little risk of the chain

jamming or the object splitting. However there is a risk that the
chain will touch the ground when you finish the cut.

1 Make sure the cutting equipment will not jam in the cut.

2 Make sure the object you are cutting will not split.

Cut all the way through the log from above. Avoid letting the
chain touch the ground as you finish the cut. Maintain full
throttle but be prepared for what might happen.

English – 19

SAFETY INSTRUCTIONS

1

2

3

If it is possible (can you turn the log?) stop cutting about 2/3
of the way through the log.

Turn the log and finish the cut from the opposite side.

The log is supported at one end. There is a high risk that it
will split.

Start by cutting from below (about 1/3 of the way through).

Limbing

When limbing thick branches you should use the same
approach as for cutting.

Cut difficult branches piece by piece.

Tree felling technique

WARNING! It takes a lot of experience to fell
a tree. Inexperienced users of chain saws

!

should not fell trees. Do not attempt any task
that you feel unsure of!

Safe distance

The safe distance between a tree that is to be felled and
anyone else working nearby is at least 21/2 tree lengths.
Make sure that no-one else is in this ”risk zone” before or
during felling.

Finish by cutting from above so that the two cuts meet.

The log is supported at both ends. There is a high risk that
the chain will jam.

Start by cutting from above (about 1/3 of the way through).

Finish by cutting from below so that the two cuts meet.

Felling direction

The aim is to fell the tree in a position where you can limb and
cross-cut the log as easily as possible. You want it to fall on
ground where you can stand and move about safely. The main
point to avoid is letting the tree fall onto another tree. See
instructions under the heading Freeing a tree that has fallen
badly.

Once you have decided which way you want the tree to fall
you must judge which way the tree would fall naturally.

20 – English

SAFETY INSTRUCTIONS

Several factors affect this:

Lean of the tree

Bend

Wind direction

Arrangement of branches

Weight of snow

You may find you are forced to let the tree fall in its natural
direction because it is impossible or dangerous to try to make
it fall in the direction you first intended.

Another very important factor, which does not affect the felling
direction but does affect your safety, is to make sure the tree
has no damaged or dead branches that might break off and
hit you during felling.

WARNING! During critical felling operations,
hearing protectors should be lifted

!

immediately when sawing is completed so
that sounds and warning signals can be
heard.

Felling

Felling is done using three cuts. First you make the directional
cuts, which consist of the top cut and the bottom cut, then you
finish with the felling cut. By placing these cuts correctly you
can control the felling direction very accurately.

Directional cuts

To make the directional cuts you begin with the top cut. Stand
to the right of the tree and cut on the pull stroke.

Next make the bottom cut so that it finishes exactly at the end
of the top cut.

The directional cuts should run 1/4 of the diameter through
the trunk and the angle between the top cut and bottom cut

should be 45°.

Clearing the trunk and preparing your retreat

Remove any branches that are in the way. To do this it is best
to work from the top down and keep the trunk between you
and the chain saw. Never limb above shoulder height.

Remove any undergrowth from the base of the tree and check
the area for obstacles (stones, branches, holes, etc.) so that
you have a clear path of retreat when the tree starts to fall.
Your path of retreat should be roughly 135 degrees away from
the intended felling direction.

The line where the two cuts meet is called the directional cut
line. This line should be perfectly horizontal and at right

angles (90°) to the chosen felling direction.

Felling cut

The felling cut is made from the opposite side of the tree and
it must be perfectly horizontal. Stand on the left side of the
tree and cut on the7 pull stroke.

Make the felling cut about 3-5 cm (1.5-2 inches) above the
bottom directional cut.

Set the spike bumper (if one is fitted) just behind the felling
hinge. Use full throttle and advance the chain/bar slowly into
the tree. Make sure the tree does not start to move in the

English – 21

SAFETY INSTRUCTIONS

opposite direction to your intended felling direction. Drive a
wedge or breaking bar into the cut as soon as it is deep
enough.

Finish the felling cut parallel with the directional cut line so that
the distance between them is at least 1/10 of the trunk
diameter. The uncut section of the trunk is called the felling
hinge.

The felling hinge controls the direction that the tree falls in.

There are methods for felling trees with a diameter larger than
the bar length. However these methods involve a much
greater risk that the kickback zone of the bar will come into
contact with the tree.

WARNING! Unless you have special training
we advise you not to fell trees with a

!

diameter larger than the bar length of your
saw!

Limbing

WARNING! Most kickback accidents happen
during limbing! Pay close attention to the

!

position of the kickback zone of the bar
when you are limbing branches that are in
tension!

Make sure that you can stand and move about safely. Work on
the left side of the trunk. Work as close as possible to the
chain saw for maximum control. If possible, let the weight of
the chain saw rest on the trunk.

All control over the felling direction is lost if the felling hinge is
too narrow or non-existent, or if the directional cuts and felling
cut are badly placed.

When the felling cut and directional cut are complete the tree
should start to fall by itself or with the aid of a felling wedge or
breaking bar.

We recommend that you use a bar that is longer than the
diameter of the tree, so that you can make the felling cut and
directional cuts with single cutting strokes. See the Technical
data section to find out which lengths of bar are
recommended for your saw.

Keep the trunk between you and the chain saw as you move
along the trunk.

Cutting the trunk into logs

See instructions under the heading Basic cutting technique.

22 – English

SAFETY INSTRUCTIONS

Freeing a tree that has fallen badly

Freeing a ”trapped tree”

It is very dangerous to remove a trapped tree and there is high
accident risk.

The safest method is to use a winch.

• Tractor-mounted

• Portable

Cutting trees and branches that are in tension

Preparations:

Work out which side is in tension and where the point of
maximum tension is (i.e. where it would break if it was bent
even more).

Decide which is the safest way to release the tension and
whether you are able to do it safely. In complicated situations
the only safe method is to put aside your chain saw and use
a winch.

General advice:

Position yourself so that you will be clear of the tree or branch
when the tension is released.

Make one or more cuts at or near the point of maximum
tension. Make as many cuts of sufficient depth as necessary
to reduce the tension and make the tree or branch break at
the point of maximum tension.

Never cut straight through a tree or branch that is in
tension!

English – 23

WHAT IS WHAT?

What is what on the chain saw?

1 Cylinder cover

2 Front handle

3 Hand guard

4 Starter

5 Chain oil tank

6 Starter handle

7 Adjuster screws, carburettor

8 Choke control/Start throttle lock

9 Rear handle

10 Stop switch (Ignition on/off switch.)

11 Fuel tank

12 Muffler

13 Bar tip sprocket

14 Chain

15 Bar

16 Spike bumper

17 Chain catcher (Catches chain if it jumps or breaks.)

18 Clutch cover

19 Right hand guard (Protects right hand if chain breaks or

jumps.)

20 Throttle control

21 Throttle lock (Prevents accidental operation of throttle

control.)

22 Decompression valve (CS 2152)

23 Combination spanner

24 Chain tensioning screw

25 Operator′s manual

26 Bar guard

27 Oil pump adjustment screw

28 Switch for heated handle (W)

24 – English

ASSEMBLY

Fitting the bar and chain

WARNING! Always wear gloves, when
working with the chain.

!

Check that the chain brake is in disengaged position by
moving the hand guard towards the front handle.

Remove the bar nuts and remove the clutch cover (chain
brake). Take off the transportation ring (A).

The chain is correctly tensioned when it does not sag from the
underside of the bar, but can still be turned easily by hand.
Hold up the bar tip and tighten the bar nuts with the
combination spanner.

When fitting a new chain, the chain tension has to be checked
frequently until the chain is run-in. Check the chain tension
regularly. A correctly tensioned chain ensures good cutting
performance and long life.

Fitting a spike bumper

To fit a spike bumper – contact your service agent.

A

Fit the bar over the bar bolts. Place the bar in its rearmost
position. Place the chain over the drive sprocket locate it in
the groove on the bar. Begin on the top edge of the bar.

Make sure that the edges of the cutting links are facing
forward on the top edge of the bar.

Fit the clutch cover and locate the chain adjuster pin in the
hole in the bar. Check that the drive links of the chain fit
correctly over the drive sprocket and that the chain is correctly
located in the groove in the bar. Tighten the bar nuts finger
tight.

Tension the chain by turning the chain tensioning screw
clockwise using the combination spanner. The chain should
be tensioned until it does not sag from the underside of the
bar.

English – 25

FUEL HANDLING

Fuel

CAUTION! The machine is equipped with a two-stroke engine
and must always been run using a mixture of petrol and two­stroke 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.

WARNING! Always ensure there is adequate
ventilation when handling fuel.

!

Petrol

• Use good quality unleaded or leaded petrol.

• 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.

• When working with continuous high revs (e.g. limbing) a
higher octane is recommended.

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.

The following applies to chain saws with catalytic converters:

Two-stroke oil

• For the best results and performance use JONSERED
two-stroke oil, which is specially formulated for our two­stroke engines. Mixture 1:50 (2%).

• If JONSERED two-stroke oil is not available, you may use
another two-stroke oil of good quality that is intended for
air cooled engines. Contact your dealer when selecting an
oil. Mixing ratio 1:33 (3%)-1:25 (4%).

• Never use two-stroke oil intended for water-cooled
outboard engines, sometimes referred to as outboard oil.

• Never use oil intended for four-stroke engines.

Petrol, litre

5 0,10 0,15 0,20

10 0,20 0,30 0,40

15 0,30 0,45 0,60

20 0,40 0,60 0,80

Two-stroke oil, litre

2% (1:50) 3% (1:33) 4% (1:25)

Petrol

Always use high grade unleaded petrol (minimum 95 RON)!
Leaded petrol will destroy the catalytic converter and it will no
longer serve its purpose. The green fuel cap on chain saws
with catalytic converters means that only unleaded petrol can
be used.

Two-stroke oil

For the best results and performance use JONSERED two­stroke oil, which is specially formulated for our two-stroke
engines. Mixture 1:50 (2%).

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

For additional information about fuels, see above.

26 – English

FUEL HANDLING

Min 3 m

(10ft)

Chain oil

• The chain lubrication system is automatic and we
recommend the use of special oil (chain oil) with good
adhesion characteristics.

• In countries where no special chain oil is available, EP90
transmission oil can be used.

• Never use waste oil. This results in damage to the oil
pump, the bar and the chain.

• It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.

• In temperatures below 0°C (32°F) some oils become too

viscous. This can overload the oil pump and result in
damage to the oil pump components.

• Contact your service agent when choosing chain oil.

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.

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.

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

Clean the area around the fuel cap. Clean the fuel and chain
oil tanks regularly. The fuel filter must be replaced at least
once a year. Contamination in the tanks causes malfunction.
Make sure the fuel is well mixed by shaking the container
before refuelling. The capacities of the chain oil tank and fuel
tank are carefully matched. You should therefore always fill
the chain oil tank and fuel tank at the same time.

English – 27

STARTING AND STOPPING

H

Starting and stopping

WARNING! Note the following before
starting:

!

Never start a chain saw unless the bar, chain
and all covers are fitted correctly. Otherwise
the clutch can come loose and cause
personal injuries.

Always move the machine away from the
refuelling area before starting.

Place the machine on firm ground. Make
sure you have a secure footing and that the
chain cannot touch anything.

Keep people and animals well away from the
working area.

Cold engine

Warm engine

Use the same procedure as for starting a cold engine but
without setting the choke control in the choke position. The
correct choke/start throttle setting is obtained by moving the
choke control to the choke position and then pushing it in
again.

Starting

Grip the front handle with your left hand. Hold the chain saw
on the ground by placing your right foot through the rear
handle. Pull the starter handle with your right hand and pull
out the starter cord slowly until you feel a resistance (as the
starter pawls engage) then pull firmly and rapidly. Never twist

the starter cord around your hand.

Starting: The chain brake must be engaged when the chain

saw is started. Activate the brake by moving the front hand
guard forwards.

Ignition; choke: Set the choke control in the choke position.
This should automatically set the stop switch to the start
position.

H

Start throttle: The correct choke/start throttle setting is
obtained by moving the control to the choke position.

If the machine is fitted with a decompression valve (A): Press
the valve to reduce the pressure in the cylinder and make
starting easier. You should always use the decompression
valve when starting the machine. Once the machine has
started the valve will automatically return to its original setting.

A

As the chain brake is still engaged the speed of the engine
must be set to idling as soon as possible, this is achieved by
quickly disengaging the throttle lock. This prevents
unnecessary wear to the clutch, clutch drum and brake band.

Push in the choke control as soon as the engine fires and
keep pulling until the engine starts. When the engine starts,
quickly apply full throttle; the throttle start lock will
automatically disengage.

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.

28 – English

STARTING AND STOPPING

Reactivate the chain brake by pushing the front hand guard
back towards the front handle. The chain saw is now ready for
use.

Stopping

Stop the engine by switching off the ignition.

H

English – 29

MAINTENANCE

L

+ 1/4

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, Basic settings, Fine adjustment

WARNING! Do not start the chain saw unless
the bar, chain and clutch cover (chain brake)

!

are fitted, otherwise the clutch may come
loose and cause personal injury.

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.

• The carburettor has three adjustment controls:

- L = Low speed jet

- H = High speed jet

- T = Idle adjustment screw

L

H

T

• The L and H-jets are used to adjust the supply of fuel to
match the rate that air is admitted, which is controlled with
the throttle. If they are screwed clockwise the air/fuel ratio
becomes leaner (less fuel) and if they are turned anti­clockwise the ratio becomes richer (more fuel). A lean
mixture gives a higher engine speed and a rich mixture
gives a lower engine speed.

• The T-screw regulates the throttle setting at idle speed. If
the T-screw is turned clockwise this gives a higher idle
speed; turning it anti-clockwise gives a lower idle speed.

To provide the engine’s components with good initial
lubrication (during running in) the carburettor should be set for
a richer fuel mixture for the first 3-4 hours that the chain saw
is in use. To do this, adjust the fast idle speed to 600-700 rpm
below the recommended max. fast idle speed.

If you are unable to check the fast idle speed using a
tachometer the H-jet should not be set for a leaner mixture
than given in the basic settings. The recommended max. fast
idle speed must not be exceeded.

Fine adjustment

When the machine has been ”run-in” the carburettor should
be finely adjusted. The fine adjustment should be carried out
by a qualified person. First adjust the L-jet, then the idling
screw T and then the H-jet.

Max. fast idle speed, rpm Idle speed, rpm

CS 2147 14200 2700

CS 2152 13000 2700

Changing the type of fuel

Fine tuning may be required if the chain saw, after changing
the type of fuel, performs differently with regard to starting,
acceleration, max. speed, etc.

Conditions

• Before any adjustments are made the air filter should be
clean and the cylinder cover fitted. Adjusting the
carburettor while a dirty air filter is in use will result in a
leaner mixture next time the filter is cleaned. This can give
rise to serious engine damage.

• Carefully turn the L and H-jets clockwise as far as they will
go. Now turn the jets one turn anti-clockwise. The
carburettor is now set to H = 1 and L = 1.

• Now start the machine according to the starting
instructions and let it warm up for 10 minutes. CAUTION!

If the chain rotates while idling the T-screw must be
turned anti-clockwise until the chain stops.

• Place the machine on a flat surface so that the bar points
away from you and so that the bar and chain do not come
into contact with the surface or other objects.

Low speed jet L

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

Basic settings and running in

The basic carburettor settings are adjusted during testing at
the factory. The basic settings are H = 1 turn and L = 1 turn.

30 – English

Try to find the highest idle speed by turning the low speed jet
L clockwise then anti-clockwise. When the highest speed has
been found, turn the low speed jet L 1/4 turn anti-clockwise.

CAUTION! If the chain rotates while idling the T-screw

must be turned anti-clockwise until the chain stops.

MAINTENANCE

Fine adjustment of the idle speed T

Adjust the idle speed with the T-screw. If it is necessary to re­adjust, turn the T-screw clockwise while the engine is running,
until the chain starts to rotate. Then turn anti-clockwise until
the chain stops. When the idle speed is correctly adjusted the
engine should run smoothly in every position and the engine
speed should be safely below the speed at which the chain
starts to rotate.

WARNING! Contact your service agent, if the
idle speed setting cannot be adjusted so that

!

the chain stops. Do not use the chain saw
until it has been properly adjusted or
repaired.

High speed jet H

• The high speed jet H influences the power and engine
speed of the machine. If the high speed jet is set too rich
(H-jet screwed in too far) the machine will over-rev and this
will damage the engine. Run the machine at full throttle for
about 10 seconds. Then turn the H-jet 1/4 turn anti­clockwise. Run the machine at full throttle for another 10
seconds or so and listen to the difference in the fast idle
speed. Repeat this procedure with the H-jet turned a
further 1/4 turn anti-clockwise.

Starter

WARNING! When the recoil spring is wound
up in the starter housing it is under tension

!

and can, if handled carelessly, pop out and
cause personal injury. Always be careful
when changing the recoil spring or the
starter cord. Always wear protective
goggles.

Changing a broken or worn starter cord

• Loosen the screws that hold the starter against the
crankcase and remove the starter.

H

• You have now run the machine at settings of H =±0, H=+1/

4, H=+1/2 relative to the basic settings. At full throttle the
engine has sounded different for each setting. The H-jet is
correctly adjusted when the machine burbles a little. If the
machine ”screams” then the machine is set too lean. If the
muffler emits a lot of smoke and the machine burbles a lot
then the setting is too rich. Turn the H-jet clockwise until
the setting sounds right

CAUTION! To ensure correct adjustment you should enlist
a qualified mechanic who has access to a tachometer.
The recommended maximum fast idle speed must not be
exceeded.

Correctly adjusted carburettor

When the carburettor is correctly adjusted the machine
accelerates without hesitation and burbles a little at full
throttle. It is also important that the chain does not rotate at
idle. If the L-jet is set too lean it may cause starting difficulties
and poor acceleration. If the H-jet is set too lean the machine
will have less power, poor acceleration and could suffer
damage to the engine. If the L and H-jets are set too rich it will
lead to acceleration problems or too low a working speed.

• Pull out the cord approx. 30 cm and hook it into the notch
in the rim of the pulley. Release the recoil spring by letting
the pulley rotate slowly backwards.

• Undo the screw in the centre of the pulley and remove the
pulley. Insert and fasten a new starter cord to the pulley.
Wind approx. 3 turns of the starter cord onto the pulley.
Connect the pulley to the recoil spring so that the end of
the spring engages in the pulley. Fit the screw in the centre
of the pulley. Insert the starter cord through the hole in the
starter housing and the starter handle. Make a secure
knot in the end of the starter cord.

English – 31

MAINTENANCE

Tensioning the recoil spring

• Hook the starter cord in the notch in the pulley and turn the
starter pulley about 2 turns clockwise.

CAUTION! Check that the pulley can be turned at least a
further 1/2 turn when the starter cord is pulled all the way
out.

Changing a broken recoil spring

Clean the air filter daily, or more often in demanding
conditions.

• Remove the air filter after taking off the air filter cover.
When refitting make sure that the air filter seals tightly
against the filter holder. Clean the filter by brushing or
shaking it.

• Lift off the pulley. See instructions under heading
Changing a broken or worn starter cord.

• Remove the recoil spring from inside the pulley by tapping
the pulley lightly with its inside face downwards against a
work bench or the like. If the spring pops out during fitting,
wind it up again, working from the outside in towards
centre.

• Lubricate the recoil spring with light oil. Fit the pulley and
tension the recoil spring.

Fitting the starter

• To fit the starter, first pull out the starter cord and place the
starter in position against the crankcase. Then slowly
release the starter cord so that the pulley engages with
the pawls.

• Fit and tighten the screws that hold the starter.

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.

• The filter can be cleaned more thoroughly by washing it in

water and detergent.

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.

A JONSERED chain saw can be equipped with different types
of air filter according to working conditions, weather, season,
etc. Contact your dealer for advice.

Spark plug

The spark plug condition is influenced by:

• Incorrect carburettor adjustment.

• Wrong fuel mixture (too much 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 0.5 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.

32 – English

MAINTENANCE

–

+

1

2

3

1

2

5

4

3

Muffler

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.

CAUTION! The mesh must be replaced if it is damaged. If the
mesh is blocked the machine will overheat and this will cause
damage to the cylinder and piston. Never use a machine with
a muffler that is in poor condition.

A muffler fitted with a catalytic converter greatly reduces the
concentration of hydrocarbons (HC), oxides of nitrogen (NO)
and aldehydes emitted with exhaust gases. However, it does
not cut down carbon monoxide (CO), which you cannot smell!
Consequently, never work in an enclosed or badly ventilated
area. Good air circulation should always prevail when working
in snowy hollows, ravines or in confined conditions.
Consequently, never work in an enclosed or badly ventilated
area. Good air circulation should always prevail when working
in snowy hollows, ravines or in confined conditions.

WARNING! The catalytic converter muffler
gets very hot during and after use. This also

!

applies during idling. Be aware of the fire
hazard, especially when working near
flammable substances and/or vapours.

Adjustment of the oil pump

The oil pump is adjustable. Adjustments are made by turning
the screw using a screwdriver or combination spanner. The
machine is supplied from the factory with the screw set to
position 2. Turning the screw clockwise will reduce the oil flow
and turning the screw anti-clockwise will increase the oil flow.

WARNING! The engine must not be running
when making adjustments.

!

Recommended settings:

Bar 13"-15": Position 1

Bar 15"-18": Position 2

Bar 18"-20": Position 3

Cooling system

To keep the working temperature as low as possible the
machine is equipped with a cooling system.

The cooling system consists of:

Needle bearing lubrication

The clutch drum is fitted with one of the following drive
sprockets:

A Spur sprocket (the chain sprocket is welded on the drum)

B Rim sprocket (replaceable)

Both versions have a needle bearing on the drive shaft, which
has to be greased regularly (once a week).

CAUTION! Use a high-quality bearing grease or engine oil.

1 Air intake on the starter.

2 Air guide plate.

3 Fins on the flywheel.

4 Cooling fins on the cylinder.

5 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.

CAUTION! The cooling system on a chain saw with catalytic
converter must be cleaned daily. This is particularly important
on chain saws with catalytic converters, because the higher
exhaust temperature requires efficient cooling of the engine
and the catalytic converter unit.

English – 33

MAINTENANCE

H

H

Centrifugal cleaning “Turbo”

Centrifugal cleaning means the following: All air to the
carburettor passes through the starter. Dirt and dust is
centrifuged out by the cooling fan.

IMPORTANT! In order to maintain operation of the centrifugal
cleaning system it must be regularly maintained.

Clean the air intake to the starter, the fins on the flywheel, the
space around the flywheel, inlet pipe and carburettor
compartment.

Heated handles (CS 2147W, CS 2152W)

On models with the model code W, both the front handle bar
and the rear handle are equipped with electrical heating coils.
These are supplied with electricity from a generator built into
the chain saw.

When the switch is pushed upwards, the heat is switched on.
When the switch is pushed downwards, the heat is switched
off.

Temperature 0°°

The cylinder cover is designed so it can be adjusted for
running in cold weather. Twist the winter flap so that
preheated air from the cylinder can pass into the carburettor
space preventing icing of the air filter, etc.

Temperature -5°°

For running the machine in cold weather or powder snow, a
special cover is available, which is mounted on the starter
housing. This reduces the intake of cold air and prevents large
amounts of snow from being sucked in.

°°

C or colder:

°°

C or colder:

Electrical carburettor heating (CS 2147WH, CS 2152WH)

If this chain saw has the model code WH then it is equipped
with an electrically heated carburettor. The electrical heating
prevents icing in the carburettor. A thermostat regulates
heating so that the carburettor always has the correct working
temperature.

Winter use

During cold weather and under powder snow conditions,
operating problems can arise due to:

• Too low engine temperature.

• Icing of the air filter and carburettor.

Special measures are therefore often required:

• Partly mask the air inlet on the starter to increase the
working temperature of the engine.

Preheat the intake air to the carburettor by using the heat from
the cylinder.

CAUTION! When the winter plug is fitted the winter flap must
be open!

CAUTION! If the special winterising kit has been fitted or any
measures have been taken to increase the temperature these
changes must be reversed before the machine is used in
normal temperature conditions. Otherwise there is a risk of
overheating, resulting in severe damage to the engine.

IMPORTANT! Any maintenance other than that described in
this manual must be carried out by your servicing dealer
(retailer).

34 – English

MAINTENANCE

1

3

0,5 mm

4

5

6

7

2

8

3 4

7

2

5

1

6

Below you will find some general maintenance
instructions.

Daily maintenance

1

4

7

1 Check that the components of the throttle control work

safely. (Throttle lock and throttle control.)

2 Clean the chain brake and check that it operates safely.

Make sure that the chain catcher is undamaged, and
replace it if necessary.

3 Clean the air filter. Replace if necessary.

4 The bar should be turned daily for more even wear. Check

the lubrication hole in the bar, to be sure it is not clogged.
Clean the bar groove. If the bar has a sprocket tip, this
should be lubricated.

5 Check that the bar and chain are getting sufficient oil.

6 Sharpen the chain and check its tension and condition.

Check the drive sprocket for excessive wear and replace
if necessary.

7 Clean the air intake on the starter. Check the starter and

starter cord.

8 Check that nuts and screws are tight.

9 Test the stop switch to ensure that it works.

10 Check the cooling system on chain saws with catalytic

converters.

2

5

8

6

9

3

10

Weekly maintenance

1 Check that the vibration damping elements are not

damaged.

2 Lubricate the clutch drum bearing.

3 File off any burrs from the edges of the bar.

4 Clean the spark plug. Check that the electrode gap is 0.5

mm.

5 Clean the fins on the flywheel. Check the starter and the

recoil spring.

6 Clean the cooling fins on the cylinder.

7 Clean or replace the spark arrestor mesh in the muffler.

8 Clean the carburettor compartment.

Monthly maintenance

1 Check the brake band on the chain brake for wear.

2 Check the clutch centre, clutch drum and clutch spring for

wear.

3 Clean the outside of the carburettor.

4 Check the fuel filter and the fuel hose. Replace if

necessary.

5 Clean the inside of the fuel tank.

6 Clean the inside of the oil tank.

7 Check all cables and connections.

English – 35

TECHNICAL DATA

Technical data

CS 2147 CS 2152

Engine

Cylinder displacement, cm
Cylinder bore, mm 42,0 45
Stroke, mm 32,5 32,5
Idle speed, rpm 2700 2700
Recommended max. speed, rpm 14200 13000
Power, kW/ rpm, Europe 2,5/9600 2,4/9000
Power, kW/ rpm, Australia - 2,4/9000

Ignition system

Manufacturer of ignition system SEM SEM
Type of ignition system CD CD
Spark plug NGK BPMR 7A

Electrode gap, mm 0,5 0,5

Fuel and lubrication system

Manufacturer of carburettor Zama Zama
Carburettor type C3-EL18 C3-EL18
Fuel tank capacity, litre 0,5 0,5
Oil pump capacity at 9,000 rpm, ml/min 5-12 5-12
Oil tank capacity, litre 0,28 0,28
Type of oil pump Automatic Automatic

Weight

Chain saw without bar or chain, empty tanks, kg 5,0: CS 2147 5,1:CS

Noise emissions

(see note 1)
Sound power level, measured dB(A) 114: CS 2147,

Sound power level, guaranteed L

Noise levels

(see note 2)
Equivalent noise pressure level at operator’s ear,
measured according to relevant international standards,
dB(A)
Europe: 102 102
Australia: - 102

Vibration levels

(see note 3)
Front handle,/Rear handle, m/s
Front handle,/Rear handle, m/s

Chain/bar

Standard bar length, inch/cm 13"/33 13"/33
Recommended bar lengths, inch/cm 13-20"/33-50 13-20"/33-50
Usable cutting length, inch/cm 12-19"/31-49 12-19"/31-49
Chain speed at max. power, m/sec 18,5 17,3
Pitch, inch/mm 0,325/8,25 0,325/8,25
Thickness of drive links, inch/mm 0,050/1,3 0,050"/1,3mm

Number of teeth on drive sprocket 7 7

Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC.
Note 2: Equivalent noise pressure level, according to ISO 7182, is calculated as the time-weighted energy total for noise pressure levels under

various working conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 max. speed.

Note 3: Equivalent vibration level, according to ISO 7505, is calculated as the time-weighted energy total for vibration levels under various working
conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 max. speed.

36 – English

3

dB(A) 115: CS 2147

WA

2

(Europe) 2,9/2,9 3,0/4,1

2

(Australia) - 3,0/4,1

45,0 51,7

Champion RCJ 7Y

2147 W, CS 2147
CWH

113: CS 2147 CWH

114: CS 2147 CWH

0,058/1,5 0,058/1,5

NGK BPMR 7A
Champion RCJ 7Y

5,0: CS 2152, CS
2152 C
5,1: CS 2152 W, CS
2152 WH, CS 2152
CW, CS 2152 CWH

112: CS 2152 C, CS
2152 CW, CS 2152
CWH
113: CS 2152, CS
2152 W, CS 2152 WH
113: CS 2152 C, CS
2152 CW, CS 2152
CWH
114: CS 2152, CS
2152 W, CS 2152 CW,
CS 2152 WH

TECHNICAL DATA

Bar and chain combinations

The following combinations are CE approved.

Bar

Length,
inches

Pitch, inch

Max. number
of teeth on tip
sprocket

13 0,325 10T Jonsered S30

15 0,325 10T Jonsered S30

16 0,325 10T Jonsered S30

18 0,325 10T Jonsered S30

20 0,325 10T Jonsered S30

13 0,325 10T Jonsered S25

15 0,325 10T Jonsered S25

16 0,325 10T Jonsered S25

18 0,325 10T Jonsered S25

20 0,325 12T Jonsered S25

Chain

PITCH =

L

D

D

_

2

English – 37

TECHNICAL DATA

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EC-declaration of conformity

(Applies to Europe only)

Jonsered, SE-561 82 Huskvarna, Sweden, tel: [phone], declares under sole responsibility that the chain saws Jonsered
CS 2147, CS 2147CWH, CS 2152, CS 2152W, CS 2152WH, CS 2152C and CS 2152CWH from 2002’s serial numbers and

onwards (the year is clearly stated in plain text on the type plate with subsequent serial number), are in conformity with the
requirements of the COUNCIL’S DIRECTIVES:

of June 22, 1998 ”relating to machinery” 98/37/EC, annex IIA.

of May 3, 1989 ”relating to electromagnetic compatibility” 89/336/EEC, and applicable supplements.

of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC.

For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: EN292-2,

CISPR 12:1997, EN608.

Notified body: 0404, SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has carried out EC type
examination in accordance with the machinery directive’s (98/37/EC) article 8, point 2c. The certificates for EC type examination
in accordance with annex VI, have the numbers: 404/02/898 – CS 2152, CS 2152W, CS 2152WH 404/02/898 – CS 2152C, CS
2152CW, CS 2152CWH 404/03/985 - 2147 CWH

In addition, SMP, Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has certified conformity with annex
V of the Council’s Directive of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC. The certificates have
the numbers: 01/161/050 - CS 2147 01/161/051 - CS 2147 CWH 01/161/047 – CS 2152, CS 2152W, CS 2152WH 01/161/048 –
CS 2152C, CS 2152CW, CS 2152 CWH

The supplied chain saw conforms to the example that underwent EC type examination.

Huskvarna 3 July 2003

Bo Andréasson, Development manager

38 – English

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1088890-26

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2003-08-19