Husqvarna 966631102 Maintenance, Carburetor, Muffler, Cooling system, Adjustment of the idle speed

MAINTENANCE

General

Remove the ignition cable and the spark plug to carry out inspection and maintenance. Keep all parts of your body away from hot surfaces.

Carburetor

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.

The factory idle speed setting is 2,000 rpm. Use the adjustment screw at the upper edge of the carburettor if the idle speed has to be adjusted.

Muffler

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.

The muffler is equipped with a special spark arrestor screen. The spark arrestor screen should be cleaned once a month. This is best done with a wire brush.

3

4

5

To remove the spark arrestor screen proceed as follows:

•Remove the exhaust duct (4).

•Remove the spark arrester (3).

•Pull out the spark arrestor screen and clean using a wire brush. Replace the spark arrestor screen if it is defective.

CAUTION! Never use a machine with a defective muffler. Check regularly that the muffler is complete and secured correctly. (1,2) Tighten the screws. 8-10Nm

1

2

Check that the spark arrester and the exhaust duct are screwed in place correctly (5). Tighten to 2-3 Nm.

!	WARNING! The muffler gets 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!

Cooling system

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

The cooling system consists of:

•Cooling fins on the cylinder.

•Air intake screen

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. Check that the nozzles are not blocked.

20 – English 1155849-49 Rev. 2 2013-03-22