MAINTENANCE
Air filterMuffler
The air filter must be regularly cleaned from dust and dirt in
order to avoid:
Y Carburettor malfunctions
Y Starting problems
Y Engine power reductionThe muffler is designed in
order to reduce the noise level
Y Unnecessary wear onand to direct the exhaust
the engine parts
gases away from the operator.
Y Abnormal fuel consumptionThe exhaust gases are hot
and can contain sparks, which
may cause fire if directed
against dry and combustible
material. Some mufflers are
Clean the air filter daily orequipped with a special
more often if the air is
exceptionally dusty in thescreen.
If your saw has this type of muffler, you should clean the screen
working area.at least once a week. This is done with a wire brush.
Y Disassemble the air filter by
removing the air filter-coverCAUTION! 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, makedamage on the cylinder and the piston. Never use a saw with a
sure that the filter is tightclogged or defective muffler.
against the filter holder.
Clean the filter by brushing
or shaking it.Needle bearing maintenance
Y A more thorough cleaning of
the filter is obtained by
washing it in water andA
soap.The clutch drum is equipped
with one of the following chain
An air filter, which is used forsprockets:
some time, cannot be cleaned
completely. Therefore it mustY Spur sprocket (A) (the chain
be replaced by a new one,sprocket is welded on the
with regular intervals.drum)
IMPORTANT! A damaged air
Y Rim sprocket (B)
filter must always be(exchangeable)
replaced.
B
Both versions have built-in
needle bearing at the drive
shaft, whitch has to be
Spark pluggreased regularly (once a
week).
NOTE! Use only high
quality bearing grease.
The spark plug condition is influenced by:
Y An incorrect carburettor setting.
Y Wrong fuel mixture (too much oil in the petrol).
Adjustment of the oil pump
Y 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 onThe oil pump is adjustable. Ad-
0,5 mmjustments are made by turning
power, difficult to start orthe screw using a screwdriver
runs poorly at idling speed,
always check the spark plugor combination spanner. The
saw is supplied from the factory
first. If the spark plug is dirty,set to 1 turn open. Turning the
clean it and check the
screw clockwise will reduce the
electrode gap. Readjust ifoil flow and turning the screw
necessary. The correct gap is
0,5 mm (0,020"). The sparkanti-clockwise will increase the
oil flow.
plug should be replaced after
about a month in operation or
WARNING! The engine must not be running
earlier if the electrodes arewhen making adjustments.
badly eroded.!
Recommended settings:
IMPORTANT! Always use theBar-15": 1 turn from the closed position.
recommended spark plug
type. An incorrect spark plugBar 15"-18": 2 turns from the closed position.
Bar 18"-24": 3 turns from the closed position.
can severely damage theBar 24"-: 4 turns from the closed position.
piston/cylinder.
These recommendations apply to HusqvarnaOs chain oil, for
other chain oil increase the oil flow by one step.
English � 31 |
ACEC
