Husqvarna 1153176-26 用户手册

English

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The carburettor has three adjustment controls:

   - L = Low speed jet
   - H = High speed jet
   - T = Idle adjustment screw

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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.

The basic carburettor settings are adjusted during testing 
at the factory. The basic settings are H = 1 turn and L = 
1 turn. To provide the engine’s components with good 
initial lubrication (during running in) the carburettor should 
be set for a richer fuel mixture for the first 3-4 hours that 
the chain saw is in use. To do this, adjust the fast idle 
speed to 600-700 rpm below the recommended 
maximum fast idle speed.
If you are unable to check the fast idle speed using a 
tachometer the H-jet should not be set for a leaner 
mixture than given in the basic settings. The 
recommended maximum fast idle speed must not be 
exceeded. CAUTION!  If the chain rotates while idling 
the T-screw must be turned anti-clockwise until the 
chain stops.

When the machine has been ”run-in” the carburettor 
should be finely adjusted. The fine adjustment should be 
carried out by a qualified person. First adjust the L-jet, 
then the idling screw T and then the H-jet.

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Before any adjustments are made the air filter should 
be clean and the cylinder cover fitted. Adjusting the 
carburettor while a dirty air filter is in use will result in 
a leaner mixture next time the filter is cleaned. This 
can give rise to serious engine damage.

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Carefully turn the L and H-jets clockwise as far as they 
will go. Now turn the jets one turn anti-clockwise. The 
carburettor is now set to H = 1 and L = 1.

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Now start the machine according to the starting 
instructions and let it warm up for 10 minutes. 
CAUTION!  If the chain rotates while idling the T-
screw must be turned anti-clockwise until the 
chain stops.

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Place the machine on a flat surface so that the bar 
points away from you and so that the bar and chain do 
not come into contact with the surface or other 
objects.

Try to find the highest idle speed by turning the low speed 
jet L clockwise then anti-clockwise. When the highest 
speed has been found, turn the low speed jet L 1/4 turn 
anti-clockwise.

CAUTION!  If the chain rotates while idling the T-screw 
must be turned anti-clockwise until the chain stops.

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.

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The high speed jet H influences the power and engine 
speed of the machine. If the high speed jet is set too 
rich (H-jet screwed in too far) the machine will over-rev 
and this will damage the engine. Run the machine at 
full throttle for about 10 seconds. Then turn the H-jet 
1/4 turn anti-clockwise. Run the machine at full throttle 
for another 10 seconds or so and listen to the 
difference in the fast idle speed. Repeat this 
procedure with the H-jet turned a further 1/4 turn anti-
clockwise.

385XP/XPG 12500

2700

390XP/XPG 13500

2700

L

+ 1/4

H