Husqvarna 326HD60X-Series Manuale Utente

18 – English

When the carburettor is correctly adjusted the machine 
accelerates without hesitation and burbles a little at 
maximum speed. It is also important that the blades do 
not move when the engine is idling or when the choke 
control is in the start position. If the low speed jet L is set 
too lean it may cause starting difficulties and poor 
acceleration.

If the high speed jet H is set too lean it will result in less 
power, less performance, poor acceleration and/or 
damage to the engine. If both the L and H jets are set too 
rich it will results in acceleration problems or too low a 
working speed.

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, 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.