I have a 1989 20' Cararra with a 220 Laser XRI (EFI)(Mercury) and can not figure out why the beeping alarm won't shut off. The oil level is good the fuel is good. Looking for a list of reasons why the alarm will sound. Does any one have any idea's where to start? I also have been looking for a manual. Thankyou in advance

Did You Check Oil Tank On Motor????

Outdrive oil resivour

yes

I had an alarm this weekend and sure enough it was the drive oil reservior. It's a common cause for the alarm going off when everything else seems normal.

I had a similar problem and it was a faulty depth gage that had an alarm. It would just start beeping and saying I was in a foot of water, but in reality I was in 30 feet. I just turned off the depth alarm Not sure if yours is the same problem but maybe worth checking out.

If your running hard and slow down quickly your oil pressure will sometimes drop below the alarm range.

oil pump gear failure, oil tank sender bad, or oil alarm module is is bad