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Author Topic: Mercury Beeping  (Read 3890 times)

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Offline JackJ

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Mercury Beeping
« on: July 23, 2012, 08:52:23 AM »
My dads boat has a continuous beep and has since he has it for over a year, just as soon as you turn the key, even without cranking the motor.   He is almost deaf and cant hear it, but I sure can.

I know a continuous beep is usually an oil problem, but it is oiling perfectly fine.    Could some of the wires be bad?

It's a Mercury 75hp.

Offline GMAN

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Re: Mercury Beeping
« Reply #1 on: July 23, 2012, 11:16:31 AM »
My old boat did the same with a 86 black max.  It was the little gear that handles the oil.  I tore all that crap off and mixed the oil and gas.  Boat ran better after that.
From: Missouri

Offline Buzzbait

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Re: Mercury Beeping
« Reply #2 on: July 24, 2012, 04:07:25 AM »
I do not remember exactly JJ but both alarms (oil level and running hot) might be controlled by the little black box.... which is mounted on the side of the block. (black box- 2.500 x 3.500 in size maybe.) I have seen that be it before when it's on all the time.

backing up to the oil topic. The float (switch mounted inside oil tank) could be bad

If it was running hot the alarm would go on also. However it may not be continuous, it may beep or be a different tone.(I do not remember, been awhile since i've had a 75hp)  .  The thermal sensor itself could be bad(i think it was near the thermostat).
Rusty Buzzbait