Yamaha F20A, Service Manual

Page: 68 / 444

3-3
INSP
ADJ
E
CONTROL SYSTEM
Idle speed adjustment
1. Measure:
●
Idle speed
Out of specification
→
Adjust.
Idle speed:
925
±
50 r/min
Measuring steps:
●
Start the engine and allow it to warm
up for a few minutes.
●
Attach the tachometer to cylinder #1’s
spark plug lead.
Tachometer:
YU-08036-A/90890-06760
2. Adjust:
●
Idle speed
Start-in-gear protection device adjustment
1. Check:
●
Start-in-gear protection device opera-
tion
Incorrect
→
Adjust.
2. Adjust:
●
Start-in-gear protection wire
Adjustment steps:
●
Turn the throttle stop screw 1 in direc-
tion
a
or
b
until the specified idle
speed is obtained.
Direction
a
Idle speed increases.
Direction
b
Idle speed decreases.
Adjusting steps:
●
Set the shift lever in the neutral posi-
tion.
●
Loosen the screw 1 .
●
Move the adjusting plate 2 until the
point
a
on the wire connector aligns
with the mark
b
in the flywheel cover.
●
Tighten the screw.