Could be your vapour detector. If you get this when you first start
your engines you should be able to silence it by pressing something on
the detector but if it just keeps going, you may have a problem with a
vapour leak.

Greg wrote:

Hi

Thought I would save myself a few dollars and do a bit of maintenance on my
Bayliner 1850 yesterday and now an alarm is sounding (constant and high
pitched)and I have no idea what it is trying to alert me to. Basically, all
I did was change the fuel separator, the oil filter, the engine oil and the
oil in the leg (Alpha One). I actually put the boat in the water yesterday
afternoon and initially thought that the alarm was just the depth alarm
(this has happened before) so I made sure that the depth alarm was turned
off and the alarm was still sounding. My only thought then was that it
might be an oil pressure alarm but the oil pressure guage on the dash was
showing expected pressures (engine temp was fine also).

Any ideas???

Thanks in advance.

Greg