Hey Folks,

I've got a 2000 Carver Voyager 374, and it has twin Gas 8.1 Liter Mercruiser Horizon engines (they are a repower from 2007). The boat is new to me, and what's happening is that the engines run great, but after about an hour of running around 1000 rpm (navigating a long no wake zone) i get a solid alarm buzzer from the Port engine.

- the oil pressure is normal
- the temperature is normal

I thought it might be the impeller, so i had that swapped out. that wasn't it. Once the alarm starts, i can't run the engine untiol the next day or it keeps going off. Next, I had a Mercruiser mechanic come out and check the engine for any stored codes. there was nothing, and he couldn't reproduce the issue.

I have a vessel view on order to attempt to gather more data, but I was wondering if anyone here had any ideas of what to look for?

Thanks for any help.