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Maintenanceand function
Air filter
The air filter must be regularly cleaned from dust and dirt in order
to avoid:
● Carburetor malfunctions
● Starting problems
● Engine power reduction
● Unnecessary wear on the engine parts
. Abnormal fuel consumption
● Harmful emissions
Clean the air filter daily or more often if the air is exceptionally
dusty in the working area. Disassemble the air filter by removing
the cylinder cover and unscrew the filter. When reassembling,
make sure that the filter is tight against the filter holder. Clean the
filter by brushing or shaking it. A more thorough cleaning of the
filter is obtained by washing it in water and soap.
Do not use gasoline or any other flammable liquid to clean the
filter; doing so can create a fire hazard and produce harmful
evaporative emissions.
An air filter, which is used for some time, cannot be cleaned
completely. Therefore it must be replaced by a new one, with
regular intervals.
IMPORTANT! A damaged air filter must always be replaced.
Muffler
The muffler is designed in order 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 screen. If your saw has this type of
muffler, you should clean the screen at least once a week. This is
done with a wire brush. The screen must be replaced, if
damaged. The saw will be overheated, if the screen is clogged.
This results in damage on the cylinder and the piston.
CAUTION! Never use a saw with a clogged or defective muffler.
0,5 mm
Y7
Spark plug
The spark plug condition is influenced by:
● An incorrect carburetor setting.
● Wrong fuel mixture (too much oil in the gasoline).
● A dirty air filter,
These factors cause deposits on the spark plug electrodes,
which may result in malfunction and starting difficulties. If the
engine is low on power, difficult to start or runs poorly at
idling speed, always check the spark plug first. If the spark
plug is dirty, clean it and check the electrode gap. Readjust if
necessary. The correct gap is 0.5 mm (.020”). The spark plug
should be replaced yearly, or earlier if the electrodes are badly
eroded.
ORTANT! Always use the recommended
ng type may ruin the piston/cylinder.
10
spark
plug type,
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Clutch drum/chain sprocket
The clutch drum is equipped with one of the following chain
SDrOCketS:
●’ Spur sprocket (A) (the chain sprocket is welded on the drum)
● Rim sprocket (B) (exchangeable)
Both versions have buit-in neeldle bearing at the drive shaft,
whitch has to be greased regularly (once a week).
NOTE! Use only high quality bearing grease.
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