Husqvarna 225BX-SERIES, Operator'S Manual

English – 

21

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