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•
Incorrect carburettor adjustment.
•
An incorrect fuel mixture (too much or incorrect type
of oil).
•
A dirty air lter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems and
starting dif culties.
If the machine is low on power, dif cult to start or runs
poorly at idle speed: always check the spark plug rst
before taking any further action. If the spark plug is dirty,
clean it and check that the electrode gap is 0.6-0.7 mm.
The spark plug should be replaced after about a month in
operation or earlier if necessary.
0,6-0,7 mm
CA UTION! Always use the recommended spark plug
type! Use of the wrong spark plug can damage the piston/
cylinder. Check that the spark plug is tted with a
suppressor.
Air lter
The air
lter must be regularly cleaned to remove dust
and dirt in order to avoid:
•
Carburettor malfunctions
•
Starting problems
•
Loss of engine power
•
Unnecessary wear to engine parts.
•
Excessive fuel consumption.
Clean the lter every 25 hours, or more regularly if
conditions are exceptionally dusty.
20 – English
MAINTENANCE
Cleaning the air lter
Remo ve the air lter cover and take out the lter. Wash it
clean in warm, soapy water. Ensure that the lter is dry
before re tting it.
An air lter that has been in use for along time cannot be
cleaned completely. The lter must therefore be replaced
with a new one at regular intervals.
must always be replaced.
If the machine is used in dusty conditions the air lter
should be soaked in oil. See instructions under the
heading Oiling the air lter.
Oiling the air lter
Always use HUSQVARNA lter oil, art. no. 531 00 92-48.
The lter oil contains a solvent to make it spread evenly
through the lter. You should therefore avoid skin contact.
Put the lter in a plastic bag and pour the lter oil over it.
Knead the plastic bag to distribute the oil. Squeeze the
excess oil out of the lter inside the plastic bag and pour
o the excess before tting the lter to the machine. Never
use common engine oil. This would drain through the lter
quite quickly and collect in the bottom.
A damaged air lter
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