Low oil sending unit stuck on creating alarm from control panel.
Mercury oil tank sensor.
This video will show you what causes this problem and how it can easily be corrected.
There are many complaints by the users of mercury motors.
The problem of faulty alarm module is commonly found among the mercury motors.
If you have a steady alarm going off but the oil is not low it is most likely the oil sending unit.
You can fix the problem by replacing wire to the horn for solving this particular problem or by replacing the sensor that measure the oil level in the motors.
The oil level is full and you replaced the oil level switch but the problem will not go away.
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Mercury oil tank level sensor 4 beeps every 2 minutes.