I have a 1998 Mercury Mariner 225 . I get a oil alarm but the tank on the motor is full . When I remove the wired sensor from the tank the alarm goes away . How do I fix this problem . I had to install a new tank two years ago . Thanks in advance
I have a 1998 Mercury Mariner 225 . I get a oil alarm but the tank on the motor is full . When I remove the wired sensor from the tank the alarm goes away . How do I fix this problem . I had to install a new tank two years ago . Thanks in advance
New tank
If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to provide the Required Info (serial number) when posting. Thanks!
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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I installed a new tank 2 years ago . So why would the alarm stop when I pull the sensor out.
Because either the level in the tank is low, OR the float in the tank is hung at a low level position.Originally Posted by Steve Robinson
If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to provide the Required Info (serial number) when posting. Thanks!
Last edited by EuropeanAM; 04-08-2024 at 01:48 PM. Reason: Second Request
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Motor serial number is OG637768
Float in the tank goes up and down. Floats like it is supposed to
If you bypassed the sensor in the tank, and the alarm stops, then the tank wasn't completely full, or the tank sensor (tank) is defective. Its really that simple.
^^^^
And if it was one of the cheap-o aftermarket tanks... that's real common.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
It was a mercury tank ordered from Mercury
If the sensor is not seeing something in the tank and alarms , why would it stop alarming out of the tank because it is still not seeing anything ?
The sensor doesn't have the ability to be "seeing" anything. Think of the sensor as a switch. The "switch" is off (open) when the tank is not completely full. The "switch" is on (closed) when the tank is completely full.
Tank is completely full and the sensor floated up as the oil rose . I let the tank over fill a bit and put the lid on . I still get a oil alarm . When I remove the sensor on the outside of the tank the alarm stops . So you think it is the sensor in the tank?
Yes
Part Number?
It's possible the magnet is missing from the float or is in the wrong position on the float.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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