Husqvarna 324HDA55X series, Operator'S Manual

Page: 18 / 24

18 –
English
MAINTENANCE
Cooling system
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1 Air intake on the starter.
2 Fins on the fl ywheel.
3 Cooling fi ns on the cylinder.
4 Cylinder cover (directs cold air over the cylinder).
Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder.
Spark plug
The spark plug condition is in fl uenced by:
• Incorrect carburettor adjustment.
• A dirty air fi lter.
These factors cause deposits on the spark plug electrodes,
which may result in operating problems and starting
dif
fi culties.
If the machine is low on power, dif fi cult to start or runs poorly
at idle speed: always check the spark plug fi 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.
CAUTION! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/cylinder.
Check that the spark plug is
fi tted with a suppressor.
Air fi lter
The air fi 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 fi lter every 25 hours, or more regularly if conditions
are exceptionally dusty.
Cleaning the air fi lter
Remove the air fi lter cover and take out the fi lter. Wash it
clean in warm, soapy water.
Ensure that the fi lter is dry before re fi tting it.
An air fi lter that has been in use for a long time cannot be
cleaned completely. The fi lter must therefore be replaced with
a new one at regular intervals. A damaged air fi lter must
always be replaced.
If the machine is used in dusty conditions the air fi lter should
be soaked in oil. See instructions under the heading Oiling the
air
fi lter.