Replacing The Air Filter; Ignition System - Husqvarna P524 Operator's Manual

Replacing the air filter
WARNING! The exhaust system is hot. Let it
!
cool before starting to replace the air filter.
If the engine seems to lack power or does not run smoothly
this may be because the air filter is clogged. It is therefore
important to replace the air filter at regular intervals (see
Maintenance schedule for correct service interval).
Replace the air filter as follows:
1 Open the engine cover.
2 Loosen the two fasteners holding the filter cover and
remove it.
IMPORTANT! Never run the engine without
!
the air filter fitted.
The filters must not be oiled. They must be
fitted dry.
3 Remove the filter cartridge from the filter housing.
4 Clean the filter by knocking the filter carefully against a
hard surface and blowing with compressed air from inside.
Never brush the dirt away. Replace the air filter if it is very
dirty.
P524 have an additional filter located behind the filter
cartridge. Clean the filter by knocking it with care against
a hard surface. Do not use compressed air for this filter.
5 Replace the filter cartridge. Make sure the filter cartridge
is correctly fitted over the air intake in the filter housing.
Maintenance
6 Replace the air filter cover, ensure that the particle
collector is facing downwards.

Ignition system

The engine is equipped with an electronic ignition system.
Only the spark plug requires maintenance.
For recommended spark plug, see Technical data.
CAUTION! Fitting the wrong spark plug type can damage
the engine.
Replacing the spark plug
1 Remove the ignition cable shoe and clean around the
spark plug.
2 Remove the spark plug with a 3/4" (19 mm) spark plug
socket wrench.
3 Check the spark plug. Replace the spark plug if the
electrodes are burned or if the insulation is cracked or
damaged. Clean the spark plug with a steel brush if it is to
be reused.
4 Reinsert the spark plug, turning by hand to avoid
damaging the threads.
5 After the spark plug is seated, tighten it using a spark plug
wrench so that the washer is compressed. A used spark
plug should be turned 1/8 of a turn from the seated
position. A new spark plug should be turned a 1/4 turn
from the seated position.
6 Replace the ignition cable shoe.
CAUTION! Inadequately tightened spark plugs can cause
overheating and damage the engine. Tightening the spark
plug too much can damage the threads in the cylinder head.
– 23
English