Alarm at no-wake speed only

[Kwik]

Posted this in the wrong thread and couldn't figure out how to move it. So, here it is again.

The admiral has been searching the forum for something similar to out problem and not found an answer, yet.

After running the boat for about 30 minutes on plane and honestly overweight, we pulled into the idle zone for anchor and float time. We were running 4 knots through idle for about 20 minutes and the alarm started beeping. I checked oil pressure, water temp, water pressure, battery voltage, bilge for water. Smart craft digital said everything was OK. I could find nothing obvious. I shut it down where we were at and we spent 6 hours floating.

When I started it back up, it immediately started beeping again. Idled out of no-wake, put it up on plane and headed to drop off our passengers. The beeping quit after only a few moments on plane. Got to the drop off point and put it back to 4 knots and beeping came back. Still no obvious problems. Dropped them off and got back out on the lake and after a few moments on plane, it quit alarming again!

Any ideas?

Thanks
Kwik

 

[ZZ13]

Possibly bad idle air control valve. Search here for "replace IAC". And also replace IAC muffler every year to keep it from clogging up and causing the Idle Air Control module to fail. The muffler is a $1 part.

 

[ColoSR]

Someone recently had a similar problem, the float in their gear oil was stuck which caused beeping when all the gauges looked normal. To test, just had to disconnect the float switch to see if the beeping stops. You could have a bad float or need more gear oil if the on plane angle makes the volume seem higher in the bottle.

 

[Kwik]

Someone recently had a similar problem, the float in their gear oil was stuck which caused beeping when all the gauges looked normal. To test, just had to disconnect the float switch to see if the beeping stops. You could have a bad float or need more gear oil if the on plane angle makes the volume seem higher in the bottle.

I think this was the problem. I won't know for sure until we put it back on the water. I got nervous and pulled out Saturday instead of spending another night on the lake. The reservoir for the drive fluid was not that low sitting in the street on the trailer. But, maybe it was on the lake. I added fluid and it does not alarm on the trailer.