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Hello. My name is Tan.
Could I get the make, model and serial number of the engine please?
Is the alarm continuous? One long tone?
Ok long tone is over heat. When was the last time the water pump was serviced? What is the temperature gauge reading?
I don't know of any McCullough engines in a Sea Ray.
I need engine model and serial number?
Is this a Inboard, Alpha or Bravo drive?
I still need the engine and drive serial numbers. http://www.mercruisermotor.com/images/Serialnumber_Location.jpg
Is the alarm sounding now?
Ok continuous alarm is over heat due to not enough water. So you have have blockage in the motor or a failing water pump.
Do you know if the water pump was serviced for sure?
Can you run the boat and see what the engine temperature is when the alarm sounds?
Could you have run over something that restricted the water flow to the engine? Sea weed, grass, ice bag???
Ok let me know.