i have a 1989 merc 8o hp....this used motor i just got the buzzer went off 5 minutes into riding it the water was pumping out great the buzzer in the control box was going off... i shut it off it would not start, check batt conection it started right up ran great. got full tank of gas i beat on it and it ran good wot for a few miles then i brought it back it and add oil to injection tank next to motor it took only about 8 oz but i burned at least 5 gal gas, does these motors have and kill features to shut motor down if oil is not pumping right....the motor is fresh water and clean as new inside case