Hi Fellow Carver Owners

I hope every one is having a great boating season. I have a 2000 Carver 404, twin Merc 7.4 gas engines. This is what I have been experiencing the last few runs with it:

* I start crusing and get up to around 11 Knots (maybe 3000rpm) and I get what I believe to be the engine alarm
* It use to happen very infrequently, but now happens more often
* If I shut the port engine down and restart it goes away, but will come back after awhile.
* All of the gauges look fine (oil pressure, water temp, et)
* The engine itself sounds and preforms weill

In the manual, it says the engine alarm monitors oil pressure and coolant temp. Both gauges are fine and I check and keep the oil filled.
A few questions:
* Any ideas on other things that set an engine alarm off?
* Can other instruments, such a fuel computer be wired into that alarm and then set it off (I don't trust my fuel computer)
* Is there any way to shut the alar off

Calling the mechanic this week, Was just curious if anyone had any thougths?

Thanks
Rich