CARBURETTOR
English – 41
Adjustment of the air screw
(570 AT, 576 XP/G AT)
1. Warm up the motor. Assess any hesitation in ac-
celeration. Adjustment is not necessary if motor
acceleration is good. Continue with step 2 if there is
any hesitation in acceleration.
2. Turn off the motor and remove the cylinder cover.
3. Screw the air screw ¼ turn clockwise with screwdri
ver 530 03 55-60 (Fig. 1). Make sure the rotation
angle of the throttle axle changes by looking at the
movement of the lever arm (Fig. 2). Then replace
the cylinder cover, warm up the motor and test the
product again.
4. Repeat steps 2 and 3 a maximum of 4 times (1 turn)
until the motor accelerates well.
5. Check that the idle speed is 2,700 rpm ± 100 rpm.
Fig. 1
Fig. 2
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