Husqvarna 33RJ 用户手册

English

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Adjust the idle speed using the idle adjustment screw T, if it 
is necessary to readjust. First turn the idle adjustment screw 
T clockwise until the cutting attachment starts to rotate. Then 
turn the screw anticlockwise until the cutting attachment 
stops. The idle speed is correctly adjusted when the engine 
will run smoothly in every position. The idle speed should 
also be well below the speed at which the cutting attachment 
starts to rotate.

The high speed jet H affects the engine power, speed, 
temperature and fuel consumption. If the high speed jet H is 
set too lean (screwed in too far) the engine speed will be too 
high and cause engine damage. Do not let the engine run at 
full speed for more than 10 seconds.

Note that the engine should be loaded when you adjust the 
high speed jet H. You should therefore fit the trimmer head 
T35 (2.7 mm cord) before adjusting the high speed jet. The 
cord length should be standard, i.e. to the knife on the 
trimmer guard.

Apply full throttle and turn the high speed jet H very slowly 
clockwise until the engine slows down. Then turn the high 
speed jet H very slowly anticlockwise until the engine starts 

to run unevenly. Now turn the high speed jet H slowly 
clockwise a little way until the engine runs smoothly. 

CAUTION!  For optimum adjustment of the carburettor, 
contact a qualified dealer/service workshop that has a 
revolution counter at their disposal. 

When the carburetor is correctly adjusted the machine will 
accelerate without hesitation and burble a little at maximum 
speed. It is also important that the cutting attachment does 
not rotate at idle. 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 
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 

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