Husqvarna 525HF3S Operator's Manual page 12

3. Turn the idle adjustment screw T clockwise until the
cutting unit starts to move.
4. Turn the idle adjustment screw counterclockwise
until the cutting unit stops.
WARNING: If the cutting unit does not
stop when you adjust the idle speed,
speak to your nearest servicing dealer.
Do not use the product until it is correctly
adjusted or repaired
Note: The idle speed is correct when the engine
operates smoothly in all positions.Refer to
data on page 16 for the 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.
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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.
Technical
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.
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.
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.
1118 - 001 - 05.09.2019