MAINTENANCE

Air filter

Muffler

The air filter must be regularly cleaned from dust and dirt in

order to avoid:

 

Carburetor malfunctions

 

Starting problems

The muffler is designed in

Engine power reduction

order to reduce the noise level

Unnecessary wear on

and to direct the exhaust

 

the engine parts

 

gases away from the operator.

Abnormal fuel consumption

The exhaust gases are hot

 

 

 

 

and can contain sparks, which

 

 

may cause fire if directed

Clean the air filter daily or

against dry and combustible

material. Some mufflers are

more often if the air is

equipped with a special

exceptionally dusty in the

screen.

working area.

If your saw has this type of muffler, you should clean the screen

Disassemble the air filter by

at least once a week. This is done with a wire brush.

 

removing the cylinder cover

CAUTION! The screen must be replaced, if damaged. The saw

 

and unscrew the filter.

 

will be overheated, if the screen is clogged. This results in

 

When reassembling, make

 

damage on the cylinder and the piston. Never use a saw with a

 

sure that the filter is tight

 

clogged or defective muffler.

 

against the filter holder.

 

 

 

Clean the filter by brushing

A muffler fitted with a catalytic converter reduces the concent-

 

or shaking it.

 

ration of hydrocarbons (HC), oxides of nitrogen (NO) and

A more thorough cleaning of

aldehydes emitted with exhaust gases. However, it does not cut

 

the filter is obtained by

down carbon monoxide (CO), which you cannot smell! Do not

 

washing it in water and

run a chain saw in an unventilated area.

 

soap.

 

An air filter, which is used for

WARNING!

some time, cannot be cleaned

The catalytic converter muffler gets very hot

completely. Therefore it must

! during and after use. This also applies during

be replaced by a new one,

idling. Be aware of the fire hazard, especially

with regular intervals.

when handling the saw near flammable

IMPORTANT! A damaged air

substances or vapours.

filter must always be

 

replaced.

 

A Jonsered chain saw can be equipped with different types of airfilter according to working and weather conditions, season etc.

Spark plug

 

Needle bearing maintenance

 

The spark plug condition is influenced by:

 

The clutch drum is equipped

A

 

 

An incorrect carburetor setting.

 

with one of the following chain

 

Wrong fuel mixture (too much oil in the gasoline).

sprockets:

 

A dirty air filter.

 

Spur sprocket (A) (the chain

 

These factors cause deposits on the spark plug electrodes,

 

 

sprocket is welded on the

 

which may result in malfunction and starting difficulties.

 

 

 

drum)

 

 

 

 

 

 

If the engine is low on

0,5 mm

Rim sprocket (B)

 

power, difficult to start or

 

(exchangeable)

 

 

 

B

runs poorly at idling speed,

 

Both versions have built-in

always check the spark plug

 

 

needle bearing at the drive

 

first. If the spark plug is dirty,

 

 

 

shaft, whitch has to be

 

clean it and check the

 

 

 

greased regularly (once a

 

electrode gap. Readjust if

 

 

 

week).

 

necessary. The correct gap is

 

 

 

NOTE! Use only high

 

0,5 mm (0,020"). The spark

 

 

plug should be replaced after

 

quality bearing grease.

 

about a month in operation or

 

 

 

 

earlier if the electrodes are

 

 

 

 

badly eroded.

 

 

 

 

IMPORTANT! Always use the recommended spark plug type. An incorrect spark plug can severely damage the piston/cylinder.

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Image 31
Jonsered 2145, 2141, 2150 manual Air filter Muffler, Spark plug