1990 90 hp Mercury beep-beep-beep-beep

[jayclagg]

After reading and following shop manuel tests for low oil sensor, and heat sensor, I replaced the warning module, but it still gos beep-beep-beep-beep as soon as I turn on the key. Could the magnet get stuck inthe oil tank and how would I un-stick it.

 

[joed]

Re: 1990 90 hp Mercury beep-beep-beep-beep

The oil float has the magnet glued to the bottom of it. I have heard of the magnet coming detached from the float and sitting in the bottom of the tank even though the float rises. This give the reading that the oil is out. You can test that by turning the tank upside down and see if it clears.
The only solution is a new tank.

 

[jayclagg]

Re: 1990 90 hp Mercury beep-beep-beep-beep

Thanks sound like might be the problem, any thougts where to get new tank ?

 

[hamit59]

Re: 1990 90 hp Mercury beep-beep-beep-beep

http://www.mercruiserparts.com/selectSerailRange.asp?doc_nbr=90+(3+CYL.)
this might be your motor but you'll need the serial