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
Y Unnecessary wear onorder to reduce the noise level
the engine partsand to direct the exhaust
Y Abnormal fuel consumptiongases 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
Clean the air filter daily orequipped with a special
more often if the air isscreen. If your saw has this
exceptionally dusty in thetype of muffler, you should
working area.clean the screen at least once
Y Disassemble the air filter bya week. This is done with a
removing the cylinder coverwire brush.A
and unscrew the filter.
When reassembling, makeCAUTION! The screen must
sure that the filter is tightbe replaced, if damaged. The
against the filter holder.saw will be overheated, if the
Clean the filter by brushingscreen is clogged. This results
or shaking it.in damage on the cylinder and
C
the piston. Never use a sawB
Y A more thorough cleaningwith a clogged or defective
of the filter is obtained bymuffler.
washing it in water and
soap.
A muffler fitted with a catalytic converter greatly reduces the
An air filter, which is used forconcentration of hydrocarbons (HC), oxides of nitrogen (NO)
some time, cannot be cleanedand aldehydes emitted with exhaust gases. However, it does
completely. Therefore it mustnot cut down carbon monoxide (CO), which you cannot smell!
be replaced by a new one,Do not run a chain saw in an unventilated area.
with regular intervals.
IMPORTANT! A damaged airWARNING!
filter must always beThe catalytic converter muffler gets very hot
replaced.!during and after use. This also applies during
A Husqvarna chain saw can be equipped with different types ofidling. Be aware of the fire hazard, especially
airfilter according to working and weather conditions, seasonwhen handling the saw near flammable
etc.substances or vapours.
Spark plugAll 8 bolts are specially made to withstand high temperatures.
The use of any bolts other than genuine Husqvarna
replacements may result in damage to the muffler and engine.
All 8 bolts must be checked and tightened as necessary. They
The spark plug condition is influenced by:should first be checked after 10 hours running time. NOTE!
Y An incorrect carburettor setting.Bolts (A), which hold the muffler to the cylinder, are located
Y Wrong fuel mixture (too much oil in the gasoline).behind the support plate (B).
Y A dirty air filter.
These factors cause deposits on the spark plug electrodes,WARNING!
which may result in malfunction and starting difficulties.The coating on the inside and outside of the
!catalytic converter unit (C) may be poisonous.
If the engine is low onWear gloves whenever you carry out service0,5 mm
power, difficult to start orwork on the catalytic converter.
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 after
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.
English � 31 |
ACEC
HUSQVARNA
