I have a 1989 evinrude that sat for 10 years, I cleaned the carbs, put a new control box and new control cables. Motor runs great but after running for a few minutes the overheat buzzer goes off. If I turn the motor off and right back on it takes the buzzer a few more minutes to go off again. The water is pumping very good and the motor dosent seem to be getting too hot. I can't figure out why the buzzer won't come right back on after turning it off and on again, it waits about two or three minutes between each time I turn it on and off. Any help would be much apreciated. Ready to Fish!