Hi folks. My first time asking for help. I have a 41 PC with twin (2000 502's). The port engine alarm will go off after about 20-25 min of 3000rpm run and I shut her down immediately. However, I can run for a while at idle or near idle with no issue. So far I've replaced the impeller and also the oil pressure and engine temperature are both within spec. Also, by doing a search on the interwebs I noticed that low voltage can also trigger this issue. All the batteries have plenty of voltage.

What should I look for next?

Thanks,
Tim

The drive reservoir also has a low level alarm. Did you check that?

No, didn't check it. What drive reservoir are you speaking of and why wouldn't it be going off at low rpm?

Any other help/suggestions? Perhaps a sensor gone bad?

Figured this out too. Was the oil pressure sensor/sender wire wasn't on all the way. Glad I figured it out.