Alarm and surging engine

[MissFLA-USA]

I have a yahama 200vz hpdi, alarm wont stop. Temp good oil pressure good. Ecm tested good. Throwing no codes. Stumped. Help!!!

 

[Docksidemarineservices]

When does the alarm sound?

 

[MissFLA-USA]

When does the alarm sound?

Constantly - from turn on to off.

 

[MissFLA-USA]

Oil pressure good, cyl head temp good. And engine revs up and slows without touching a thing.

 

[Docksidemarineservices]

Alarm is on from, Key on.......What is flashing on your gauge? Possible low oil alarm from remote oil tank or engine oil tank.

 

[MissFLA-USA]

Alarm is on from, Key on.......What is flashing on your gauge? Possible low oil alarm from remote oil tank or engine oil tank.

No gauge flashing. All normal. Oil not low in either tank. Pump was replaced too.

 

[Docksidemarineservices]

No gauge flashing. All normal. Oil not low in either tank. Pump was replaced too.

Oil does not have to be low. Float can be bad, wire harness can be bad.....

 

[boscoe]

No gauge flashing. All normal. Oil not low in either tank. Pump was replaced too.

Do you have a Yamaha multi-function tachometer? Are you saying that all three oil bars are illuminated steady state and that the over temperature bar is not flashing?

With the key off, inspect the pink wire to the warning buzzer for a connection to ground. There should not be one. The buzzer is grounded to cause it to alarm. If you are not seeing anything amiss on your tachometer then perhaps (a wild guess) the ground wire to the buzzer has been chaffed to a ground source.

Is this something that just started on a motor that you have been using for a while without any problems?