2002 Mercury 150hp, 175hp, 200hp EFI Repair Manual.

90 hp mercury low oil alarm

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Can't test the low-oil alarm because when the tank is plugged in I get the never ending fast beeping of the no-oil. 2. . Pull low oil alarm sensor or replace it.

Once the oil level is so low those conditions do not affect it anymore it will remain steady.

When I stop the boat and idle for only 5 seconds or so, the alarm stops.

I am getting an sporadic overheating alarm while running over 3,000 rpms with my 1987 Mercury 90hp outboard.

Trimming the motor up and down (attitude of the engine).


With the oil tank unplugged, the temp alarm tests OK.

Mercury MarineMercruise New OEM 175 to 300 HP V6 & V8 Outboard Oil Filter, 35-8M0123025. 2. We all know the usual sound of the Mercury outboard motor when we ignite this. The oil is fu read more.

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I am getting an sporadic overheating alarm while running over 3,000 rpms with my 1987 Mercury 90hp outboard.
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99. Nov 26, 2015 The alarm goes off the sensor from the tank on the engine.

If you are getting a low oil alarm on your Mercury or Mariner oil injection outboard, it is probably the oil level. .

For a 2 beep per.

4. If the engine turns over or cranks like it always has, then chances are you are looking at a fuel problem.




We start the engine , it idles for about 2-3 minutes and then the low oil alarm audible and red light comes, after a bit of time , the horn shuts off, red light remains. As the oil level decreases to a certain point, the alarm may alternate on and off for two reasons 1. . .

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Nov 24, 2010 my 1988 mercury outboard 100 hp.

Satisfaction rating 5 out of 5 (21 Ratings) 158. . motor was trimmed up as I brought the unit down and out and then began to leak a lot of oil.

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If the engine overheats, or thinks it is, what the temperature sensor does is is ground out the alarm lead that comes out of the CDI box. MODULE-OILWARNING 14857A16. Quantity Add to Cart. The OP and main manual says it is either low oil or the fuelwater separator is full of water.