Husqvarna 450e EPA III 用户手册

36 – English

115 13 81-96 Rev.3 2008-12-16

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 0.020 inch (0.5 
mm). The spark plug should be replaced after about a 
month in operation or earlier if necessary.

Note! 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.

Lubricate the bar tip sprocket each time you refuel. Use 
the special grease gun and a good quality bearing grease.

The clutch drum has a needle bearing on the output shaft. 
This needle bearing must be lubricated regularly.

When lubricating, remove the clutch cover by loosening 
the two bar nuts. Lay the saw on its side with the clutch 
drum upwards.

Lubrication involves engine oil dripping into the centre of 
the clutch drum as it rotates.

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

Air guide plate.

3

Fins on the flywheel.

4

Cooling fins on the cylinder.

5

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.