Low oil sending unit stuck on creating alarm from control panel.
Mercury oil tank sensor.
The oil level is full and you replaced the oil level switch but the problem will not go away.
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This video will show you what causes this problem and how it can easily be corrected.
Mercury oil tank level sensor 4 beeps every 2 minutes.
The engine 2 stroke oil tank has a low oil sensor in the bottom of it and can t be replaced without replacing the whole tank.
So your mercury outboard is experiencing the common problem of the alarm beeping 4 times every 2 minutes.
There are many complaints by the users of mercury motors.
If you have a steady alarm going off but the oil is not low it is most likely the oil sending unit.