Husqvarna 123HD60 用户手册

English

 – 15

Your Husqvarna product has been designed and 
manufactured to specifications that reduce harmful 
emissions. After the engine has used 8-10 tanks of fuel the 
engine will be run-in. To ensure that it continues to run at peak 
performance and to minimise harmful exhaust emissions 
after the running-in period, ask your dealer/service workshop 
(who will have a rev counter at their disposal) to adjust your 
carburettor.

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The carburetor governs the engine’s speed via the throttle 
control. Air and fuel are mixed in the carburetor. The air/
fuel mixture is adjustable. Correct adjustment is essential 
to get the best performance from the machine.

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The setting of the carburetor means that the engine is 
adapted to local conditions, for example, the climate, 
altitude, fuel and the type of 2-stroke oil.

The T-screw regulates the throttle setting at idle speed. If the 
T-screw is turned clockwise this gives a higher idle speed; 
turning it anti-clockwise gives a lower idle speed.

Before any adjustments are made, make sure that the air filter 
is clean and the air filter cover is fitted.

Adjust the idle speed with the idle adjustment screw T, if 
adjustment is necessary. First turn the idle adjustment screw 
T clockwise until the blades start to move. Then turn the idle 
adjustment screw T anticlockwise until the blades stop. The 
idle speed is correctly adjusted when the engine runs 
smoothly in every position. There should also be a clear 
margin to the speed at which the blades start to move. The 
blades must also remain stationary when the choke control is 
in the start throttle position.

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 
screen. If your machine has this type of muffler, you should 
clean the screen at least once a week. This is best done with 
a wire brush.

On mufflers without a catalytic converter the screen should be 
cleaned weekly, or replaced if necessary. On mufflers fitted 
with a catalytic converter the screen should be checked, and 
if necessary cleaned, monthly. If the screen is damaged it 
should be replaced. If the screen 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 screen 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.

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