75hp Mercury Outboard Oil Level Sensor Alarm

kindwall

Recruit
Joined
Aug 28, 2010
Messages
1
My son took out my 18.5 center console with an early 2000s Mercury 75 last weekend. The oil lever alarm went off and he filled the tank with the 2-stoke oil stored on board.

Even with the tank full - the alarm continues to sound a steady tone.

The steady alarm sounds even with the engine off but the ignition key turned to power on.

The oil tank is full.

I have removed the securing bolts from the oil tank and have removed the sensor "stick" from the tank. When I do so (with the motor off) the alarm stops sounding but resumes sounding when the "stick" is replaced.

I have shot wd40 into the hole that the "stick" fits into and have probed the hole with a wire hoping to reset whatever switch is up there but no change to the alarm.

Slide the wire stick in and the alarm goes off, pull the wire stick out and the alarm goes off.

Any suggestions?
 

cannonford57

Petty Officer 1st Class
Joined
Mar 5, 2008
Messages
353
Re: 75hp Mercury Outboard Oil Level Sensor Alarm

you have to replace the complete tank assembly...hope that helps
 

wmrcer

Cadet
Joined
Oct 3, 2008
Messages
10
Re: 75hp Mercury Outboard Oil Level Sensor Alarm

like mentioned upove you need to replace the whole oil tank. Its a faulty sensor that only replacing the tank can fix. The tank cost me $80.00.

This happened to my 04 75hp
 
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