Husqvarna 325HDA55 ユーザーズマニュアル

English

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Some mufflers are equipped with a special spark arrestor 
mesh. If your machine has this type of muffler, you should 
clean the mesh at least once a week. This is best done with a 
wire brush.

On mufflers without a catalytic converter the mesh should be 
cleaned weekly, or replaced if necessary. On mufflers fitted 
with a catalytic converter the mesh should be checked, and if 
necessary cleaned, monthly. If the mesh is damaged it 
should be replaced. If the mesh is frequently blocked, this 
can be a sign that the performance of the catalytic converter 
is impaired. Contact your dealer to inspect the muffler. A 
blocked mesh will cause the machine to overheat and result 
in damage to the cylinder and piston. See also instructions 
under the heading Maintenance.

CAUTION!  Never use a machine with a defective muffler.

To keep the working temperature as low as possible the 
machine is equipped with a cooling system.

The cooling system consists of:

1

Air intake on the starter.

2

Fins on the flywheel.

3

Cooling fins on the cylinder.

4

Cylinder cover (directs cold air over the cylinder).

Clean the cooling system with a brush once a week, more 
often in demanding conditions. A dirty or blocked cooling 
system results in the machine overheating which causes 
damage to the piston and cylinder.

The spark plug condition is influenced by:

•

Incorrect carburetor adjustment.

•

An incorrect fuel mixture (too much or incorrect type of 
oil).

•

A dirty air filter.

These factors cause deposits on the spark plug electrodes, 
which may result in operating problems and starting 
difficulties.

If the machine is low on power, difficult to start or runs poorly 
at idle speed: always check the spark plug first before taking 
any further action. If the spark plug is dirty, clean it and check 
that the electrode gap is 0.5 mm (0,020"). The spark plug 
should be replaced after about a month in operation or earlier 
if necessary.

CAUTION!  Always use the recommended spark plug type! 
Use of the wrong spark plug can damage the piston/cylinder. 
Check that the spark plug is fitted with a suppressor.

The air filter must be regularly cleaned to remove dust and dirt 
in order to avoid:

•

Carburettor malfunctions

•

Starting problems

•

Loss of engine power

•

Unnecessary wear to engine parts

•

Excessive fuel consumption.

Clean the filter every 25 hours, or more regularly if conditions 
are exceptionally dusty.