have 1989 Mercury xr2 150. When switch is switched on buzzer does mormal, couple short beeps. When boat planes out and you reach say 45-50 miles per hour start getting short beeps several times toward fishing hole. Stop and fish take off to new location and run the dog out of it no beeping, water pump shooting out a stream of water 4 feet behind motor. Stop and fish and take off again a steady beep none stop water still shooting 4 feet out behind motor. What is wrong and what to check. Oil reservoir on motor full and main oil tank is about 3/4 full. Sitting still motor is smoking like it is on fire. Know it is getting oil. Any ideas would be appreciated. 1989 motor has less than 400 hours on it. yes that is right. Water pressure is about 17 pounds.
