My boat is wired for the Merc alarm system for the oil pressure, temp, drive lube, ect... Question is where is the buzzer located?? I can not find it and have never heard it go off even when checking the senders operation. Thanks for the help.
Brian

The buzzer should be under/behind the dash.

That's where mine are.

I think there is a time delay for the warning horn as well. So in order for it to go off, you have to wait at least 30 seconds, or whatever the time delay is. This would keep the alarm from going off, due to low oil pressure, before you start the engine.
-Steve

Thanks for the help guys. I will investigate further this week.