Husqvarna 122HD60 - Инструкция по эксплуатации - Страница 16

MAINTENANCE

16 – English

Carburettor

Adjustment of the idle speed

Before any adjustments are made, make sure that the air 
filter is clean and the air filter cover is fitted. Make sure the 
start throttle position is disengaged.
Adjust the idle speed using the idle adjustment screw T, if it 
is necessary to readjust. First turn the T screw clockwise until 
the cutting attachment starts to move. Then turn the screw 
anticlockwise until the cutting attachment stops. The idle 
speed is correctly adjusted when the engine runs smoothly 
in every position. The idle speed should also be well below 
the speed at which the cutting attachment starts to move.

Rec. idle speed:

 See the Technical data section.

Muffler

CAUTION! 

 Some mufflers are fitted with a catalytic 

converter. See chapter on Technical data to see whether 
your machine is fitted with a catalytic converter.
The muffler is designed to reduce the noise level and to 
direct the exhaust gases away from the operator. The 
exhaust gases are hot and can contain sparks, which may 
cause fire if directed against dry and combustible material.

Some mufflers are equipped with a special spark arrestor 
mesh. If your machine has this type of muffler, the mesh must 
be cleaned. This is best done with a wire brush.
On mufflers without a catalytic converter, the mesh should be 
cleaned or replaced if necessary once a week. 

If the mesh 

is damaged it must be replaced.

 If the mesh is frequently 

blocked, this can be a sign that the carburettor is incorrectly 
adjusted or that too much oil has been mixed with the petrol.

On mufflers fitted with a catalytic converter, the mesh 
must be checked, and if necessary cleaned, monthly. 

If 

the mesh is damaged it must 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.

CAUTION! 

 Never use a machine with a defective muffler.

Cooling system

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

The cooling system consists of:
1

Cooling fins on the cylinder.

2

Cylinder cover (directs cold air over the cylinder).

3

Air intake through the crankcase (inside the tank).

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.

Spark plug

The spark plug condition is influenced by:
•

Incorrect carburettor 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. The 

!

WARNING! If the idle speed cannot be 
adjusted so that the cutting attachment 
stops, contact your dealer/service 
workshop. Do not use the machine until 
it has been correctly adjusted or 
repaired.

!

WARNING! Mufflers fitted with catalytic 
converters get very hot during use and 
remain so for some time after stopping. 
This also applies at idle speed. Contact 
can result in burns to the skin. 
Remember the risk of fire!

H1153993-26,122HD45,60#4ACBF.fm  Page 16  Tuesday, January 4, 2011  8:31 AM