1989 60 h.p. mercruiser buzzer going off

[hartbeer]

I have a 1989 60 h.p. mercruiser, and whenever i give it full throttle the overheat buzzer goes off, any ideas what might be wrong or what i need to do?

 

[jim dozier]

Re: 1989 60 h.p. mercruiser buzzer going off

1. Impeller<br />2. Thermostat<br />3. Temp sensor<br />4. Coolant blockage<br />5. Aliens