Husqvarna 225 HBV - Manual (Page 21)

English –
19
MAINTENANCE
NOTE!
Some mufflers are fitted with catalytic converters.
See “Technical data” to find out if your machine is
equipped with a catalytic converter.
The muffler is designed to dampen the noise level
and to direct the exhaust fumes away from the user.
The exhaust fumes are hot and can contain sparks,
which can result in fire if the exhaust fumes are
directed towards a dry and inflammable material.
Some mufflers are equipped with a special spark
arrest screen. If your machine is fitted with this type
of screen it should be cleaned regularly. This is
done using a wire brush. On mufflers without a
catalytic converter the screen should be cleaned
weekly, or replaced if necessary. On mufflers fitted
with a catalytic converter the screen should be
checked and cleaned monthly. If the screen is
damaged it should be replaced. If the screen is
frequently blocked, this can be a sign that the
function of the catalytic converter is impaired.
Contact your dealer to inspect the muffler. A blocked
screen will cause the engine to overheat resulting in
damage to the cylinder and piston. Also see under
“Maintenance”.
NOTE!
Never use a machine with a defective muffler.
Muffler
2 3
1
4
The engine is equipped with a cooling system for
maintaining the right operating temperature.
The cooling system consists of the following
components:
1. Air intake on the starter device.
2. Fan blades on the flywheel.
3. Cooling fins on the cylinder.
4. Cylinder cowling (guides cooling air flow against
cylinder surfaces).
Clean the cooling system by brushing once a week,
or more often, if necessary.
A dirty or blocked cooling system will cause the
blower to overheat and this will damage the cylinder
and piston.
Cooling system