Yamaha F225A Service Manual page 334

TRBL
SHTG
Active test
Selecting this command displays a window where active tests (fully open ISC valve and angle of
ISC valve opening) can be selected.
WARNING
Avoid clicking the Execute and Cancel buttons repeatedly, otherwise the ECM or PC may not
work properly and they may be damaged.
NOTE:
The test can be carried out while the engine is running and the shift is in the neutral position. It is not
possible to carry out the test while the boat is running.
Fully opening the ISC valve:
When the shift is in neutral and the engine is idling, fully open the ISC valve, and then check that the
engine speed revs up, and that the intake valves are normal. The operating time is two seconds.
WARNING
When the ISC valve is fully open the engine speed will increase, therefore do not put the shift
into gear.
9-35
Troubleshooting
Displays keyboard operations.
Fig. 44
69J3D11