Husqvarna 385XP Manuale Utente

30 – 

English

Turn the low speed jet L clockwise until it stops. If the engine 
accelerates poorly or idles unevenly, turn the low speed jet L 
anticlockwise until good acceleration and idling are achieved.

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

Adjust the idle speed with the T-screw. If it is necessary to re-
adjust, turn the T-screw clockwise while the engine is running, 
until the chain starts to rotate. Then turn anti-clockwise until 
the chain stops. When the idle speed is correctly adjusted the 
engine should run smoothly in every position and the engine 
speed should be safely below the speed at which the chain 
starts to rotate.

CAUTION!  If the high speed jet is screwed in too far, it 
may damage the piston/cylinder.

When test run at the factory, the high speed jet is set so that 
the engine satisfies the applicable legal requirements at the 
same time as achieving maximum performance. The 
carburettor’s high speed jet is then locked using a limiter cap 
in the fully screwed out position. The limiter cap limits the 
potential to adjust the high speed jet to at most half a turn.

CAUTION! There is an integrated speed governor in the 
ignition system that limits the maximum speed to 13000 rpm. 
The maximum speed will not exceed 13000 rpm when the 
high speed jet is adjusted (screwed in). When the speed 
governor is activated, you will get the same sound experience 
as when the chain saw 4-cycles.

To adjust the carburettor correctly you should contact a 
mechanic with access to a rev counter.

CAUTION! As the spark is cut off, the rev counter does not 
show speeds higher than 13000 rpm.

When the carburettor is correctly adjusted the machine 
accelerates without hesitation and 4-cycles a little at full 
throttle. It is also important that the chain does not rotate at 
idle. If the L-jet is set too lean it may cause starting difficulties 
and poor acceleration. If the H-jet is set too lean the machine 
will have less power, poor acceleration and could suffer 
damage to the engine.

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

•

Adjusting the carburettor means that the engine is 
adapted to local operating conditions, e.g. climate, 
altitude, petrol and the type of 2-stroke oil.

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The carburettor has three adjustment controls:

   - L = Low speed jet

   - H = High speed jet

   - T = Idle adjustment screw

•

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.