Mariner 50HP (early 1990's) alarm sounding

[ADS]

Good evening guys, coming back from Cowes earlier on today the 50 on the SR4 started beeping at me coming from inside the depths of the control box.
I topped up the autolube system straight away (there was about a 1/3 in there but it was fairly rough so was probably sloshing around). I felt the engine block and it was warm but no hotter than usual, the tell tale was pumping like a hose pipe as per usual and was ice cold.
Any suggestions of things to check, I reckon the engine is fine it just thinks theres a problem, maybe a poor connection or a sensor somewhere fudged.
Was running mint at the time, even hit 42MPH GPS (on an SR4)

[Turbodiesel]

Disconnect the Temp sensor and then the oil level sensor when it goes off again, at least you will know which one is playing up.

[ADS]

Thanks for the info!
Do you know roughly where abouts I can find those sensors, (i ve recently moved house and I can't for the life of me find the workshop manual!)
Its a triple cylinder, triple carb, the shape after the clam shells.

Cheers,

[Nos4r2]

From memory it's attached to a blue/red or blue/brown striped wire attached which is held onto the motor by a plastic bracket. The sensor itself looks like a button cell with the wire attached to the middle of it. It fits into a recess on the head.


You may find you've got one-I think I gave you a new one in amongst the bits when I sold you the boat.