Yamaha F100C Service Manual page 330

TRBL
SHTG
Symptom: Engine can run, but engine speed will not increase.
Overheat warning indicator is on.
Oil pressure warning indicator is on.
Warning indicator is on and buzzer is sounding.
• Check the water cooling system.
• Check the lubricating system.
(Cooling system)
Check the water inlet for clogs
or debris.
Clogs or debris?
Yes
Clean the water inlet.
Check the thermostat operation.
Good condition?
Yes
Check the thermo sensor.
Good condition?
Yes
Replace the CDI unit.
9-9
Troubleshooting
Check that cooling water is dis-
No
charged from the pilot water
outlet.
No
Replace the thermostat.
No
Replace the thermo sensor.
Is water dis-
charged?
Yes
Check the water
passage.
No
Check the water
pump impeller.
Yes
Good condition?
No
Replace the impel-
ler.
62Y5A11