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My engine is a 4 cylinder and oil injection has always worked fine. It does have the two carbs that cut out when under 2000 rpm but that also works fine. I just need to know the procedure of how to open throttle control box so I can dis connect the buzzer.
I believe what you have is a bad oil warning module, it differentiates between the oil (beeping) and the overheat(solid buzzer). It is located on the stbd side just below the lip on the lower pan…might have to remove the stbd side cover. Not a good idea to unplug the buzzer cause then you have 0 warning of problems. You also might have the warning buzzer wire grounded somewhere between the engine and the control box. Do you have a sidemount merc control box? The newer style has 2 screws on the backside of the box that holds the 2 halves together….be careful pulling it apart, it can become a can of worms if your not experienced with them.