Cooling System - Husqvarna 525P4S Manuel D'utilisation

The idle speed is correct when the engine operates
smoothly in all positions. The idle speed must be below
the speed when the saw chain starts to turn.
WARNING: If the saw chain does not stop
when you adjust the idle speed, turn to your
nearest servicing dealer. Do not use the
product until it is correctly adjusted or
repaired.
Technical data on page 24 for the
Note: Refer to
recommended idle speed.
To do maintenance on the muffler
The muffler decreases the noise level and directs the
exhaust gases away from the operator.
WARNING: Mufflers that have catalytic
converters get very hot during operation and
will stay hot for some time after you stop the
product. This also applies at idle speed. If
you touch the product it can result in burns
to the skin. Think about of the risk of fire.
1. Stop the product and let it cool down.
2. Remove the cover to the muffler.
3. Remove the screw holding the spark arrestor mesh.
4. Clean the spark arrestor mesh if it is blocked or
replace it if it is damaged.
CAUTION: The spark arrestor mesh must be
replaced if it is damaged. Do not use a
product if the spark arrestor mesh on the
muffler is missing or defective.
703 - 005 - 20.10.2020
CAUTION: If the spark arrestor mesh is
frequently blocked it can be a sign that
performance of the catalytic converter is
decreased. Turn to your servicing dealer to
examine the muffler. A blocked spark
arrestor mesh will cause overheating and
result in damage to the cylinder and piston.

Cooling system

The product has a cooling system to keep the operation
temperature as low as possible.
Clean the components of the cooling system with a
brush weekly or more frequently in rougher conditions. A
dirty or blocked cooling system makes the product too
hot which causes damage to the piston and cylinder.
The cooling system has the following components:
1. Air intake on the starter.
2. Fins on the flywheel.
3. Cooling fins on the cylinder.
4. Cylinder cover.
5. Muffler cover.
6. Muffler plate.
3
1
To examine the spark plug
CAUTION: Always use the recommended
spark plug type, refer to
page 24 . Incorrect spark plug type can
cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
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2
6
5
Technical data on
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