Idling Speed (Except For Usa) - Yamaha F4 Service Manual

INSP
ADJ
a
b
CONTROL SYSTEM
1
b
1
a
Measurement steps:
8 Start the engine and allow it to warm
up for a few minutes.
8 Attach the tachometer to the spark
plug lead of cylinder.
Tachometer:
YU-08036-A
2. Adjust:
9 Idling speed
Adjustment steps:
8 Turn the throttle stop screw 1 in di-
rection a or b until the specified
idling speed is obtained.
Turning in a a ® Idling speed increases.
Turning out b b ® Idling speed decreases.

Idling speed (Except for USA)

NOTE:
Before adjusting the idling speed, the throt-
tle cable slack should be properly adjusted.
1. Turn the pilot screw 1 until it is lightly
seated.
2. Turn the pilot screw 1 in direction a or
b until the idling speed is at highest
position by the specified number of
turns.
Pilot screw:
1-7/8 ± 1/2 turns out
3. Measure:
9 Idling speed
Out of specification ® Adjust.
Idling speed:
1,500 ± 50 r/min.
Measurement steps:
8 Start the engine and allow it to warm
up for a few minutes.
8 Attach the tachometer to the spark
plug lead of cylinder.
Tachometer:
YU-08036-A/90890-06760
3-4
E