Mercruiser warning system??

[tah112]

As soon as I turn the key on to on pos. the alarm is a continous sound so I disconnected the oil press switch right below the oil filter and the alarm went off, so I replaced the switch and still the same thing. Also disconnected the oil pressure , water temp and lower unit and the alarm did not turn off. So the switch i replaced and still the same

Mercruiser OF126388 , 1994 5.0 alpha one

any help would be great.

 

[Don S]

Re: Mercruiser warning system??

Situation Normal.
That's how it's supposed to work. If the key is on, and the engine is not running, there is no oil pressure, and the alarm goes off.