TRBL
SHTG
Troubleshooting
9-11
6D81G11
Symptom: Engine does not accelerate when the throttle is opened quickly.
The engine turns off when the throttle is opened quickly.
Acceleration is tardy and the engine is likely to stop at any moment.
• Check the engine using the diagnostic flash indicator or the Yamaha Diagnostic System.
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 cooling system.
• Check the lubrication system.
Cooling system
Check the cooling water inlet for
clogs or debris.
Check that cooling water is
discharged from the cooling
water pilot hole.
Replace the thermostat.
Check the water
pump impeller.
Check the water
passage.
Clogs or debris?
Is water
discharged?
Clean the cooling water inlet.
Yes
No
No
Yes
Yes
Yes
No
No
Check the thermostat operation.
Replace the
impeller.
No
Yes
Check the cooling water tem-
perature sensor.
Check the engine using the
Yamaha Diagnostic System.
Replace the cooling water tem-
perature sensor.
Good condition?
Good condition?
Good condition?
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