21
MAINTENANCE
W ARNING: The inside of the
muffler contain chemicals that may
be carcinogenic. Avoid contact with
these elements in the event of a
dama ged muffle r.
W ARNING: Bear in mind that:
Engine exhaust fumes contain car-
bon mono xide, which ca n caus e
carbon m onoxide p oisoning. For
this reason you should not start or
run the mac hine indo ors, or any-
where that is poorly ventilated.
The ex haust fumes from the engine
are hot and may contain sparks
which can start a fire. Never start
the mac hine indo ors or near com-
bustible material!
Spark plug
The spark plug condition is influenced by:
S Incorrect carburetor adjustment.
S An incorrect fuel mixture (too much or in-
correct type of oil).
S A dirty air filter.
These factors cause deposits on the spark
plug electrodes, which may result in operat-
ing 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
0,6 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 dam age the piston/cylinder.
0,6 mm
Air filter
The air filter must be regularly cleaned to
remove dust and dirt in order to avoid:
S Carburetor malfunctions
S Starting problems
S Loss of engine power
S Unnecessary wear to engine parts
S Excessive fuel consumption
Clean the filter every 25 hours, or more
regularly if conditions are exceptionally
dusty.
Cleaning the air filter
Remove the air filter co ver and t ake o ut the
filter . Wash it clean in warm, soapy water .
Rinse thoroughly. Ensure that the filter is dry
before refitting it.
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.
Bevel gear
The bevel gear is filled with the right quan-
tity of grease at the factory. However, be-
fore using the machine you should check
that the bevel gear is filled three--quarters
full with grease. Use HUSQVARNA special
grease.
The grease in the bevel gear does not nor-
mally need to be changed except if repairs
are carried out.
W ARNING: Mufflers get very hot
during use a nd remai n so for some
time afte r stopping. This al so ap-
plies a t idle spe ed. Contact c an re-
sult in burns to the skin. Remember
theriskoffire!