Husqvarna 236: MAINTENANCE

MAINTENANCE

Contact your dealer to inspect the muffler. A blocked

Carburettor

mesh will cause the machine to overheat and result in

damage to the cylinder and piston.

Adjusting the idle speed (T)

CAUTION! Never use a machine with a defective muffler.

Check that the air filter is clean. When the idle speed is

correct, the cutting attachment should not rotate. If

adjustment is required, close (turn clockwise) the idle

adjustment screw T, with the engine running, until the

cutting attachment starts to rotate. Open (turn

anticlockwise) the screw until the cutting attachment

stops. The idle speed is correctly set when the engine

runs smoothly in all positions, and there is a clear margin

to the speed at which the cutting attachment starts to

rotate.

Cooling system

To keep the working temperature as low as possible the

machine is equipped with a cooling system.

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.

The cooling system consists of:

1 Cooling fins on the cylinder.

Muffler

2 Air intake.

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

NB! Some mufflers are fitted with a catalytic converter.

damage to the piston and cylinder.

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.

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H1153278-30,236R.fm Page 76 Friday, December 4, 2009 1:21 PM

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!