Husqvarna 966629402 用户手册

20 – English

1155849-49 Rev. 2 2013-03-22

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

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.

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.

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

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

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.

3

4

5

1

2

H1155849-49,560,570,580.fm  Page 20  Friday, March 22, 2013  2:31 PM