Yamaha 200A - Air Intake System Troubleshooting

60H5E11
Troubleshooting
TRBL
SHTG
Ye s
No
No
Ye s
Ye s
No
Ye s
No
Symptom: The engine idle speed is not steady, but
increases or decreases.
• Check the air intake system.
• Check the ignition system.
• Check the intake manifold.
Air intake system
Check the operation of the
throttle cable and throttle link.
Good operating
condition?
Adjust the throttle cable and
throttle link.
Check the carburetor operation.
Check the ignition system.
Check the intake manifold
gasket and the reed valve to
verify the integrity of the air
intake system.
Are there
sparks?
Check the ignition spark using
the spark gap tester.
Good operating
condition?
Adjust the carburetor.
Check the ignition timing.
Is ignition
timing correct?
Adjust the ignition timing.
9-9