Yamaha F150A Service Manual page 303

Symptom 4: Hunting occurs.
Check the throttle valve opening
of each cylinder.
Are the throttle
valves open
excessively?
No
Adjust the throttle cable.
Symptom 5: Engine speed rises even when the throttle position is fixed.
Check the throttle cable
operation.
Good condition?
Yes
Synchronize the throttle valves.
63P3F11
Yes Synchronize the throttle valves
or replace the defective parts.
No
Adjust the throttle cable.
Power unit
1
2
3
4
5
6
7
8
9
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