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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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1978 mercury 402 40hp new water pump put in by previous owner

Customer Question

1978 mercury 402 40hp new water pump put in by previous owner but he says it still over heats and quites right a way.
Submitted: 1 year ago.
Category: Boat
Expert:  Joe replied 1 year ago.
Thank you for allowing me to assist you, my name is ***** ***** I will be happy to assist you with your concern today.
Can you find out if the old water pump impeller had come apart and when he removed it to replace if there were pieces/chunks missing?
Also was it just the impeller or the kit with housing?
How about the thermostat?
Customer: replied 1 year ago.
No therm was replaced and as for chunks and or what type. That's what previous owner told me.
Customer: replied 1 year ago.
I guess I better get with previous owner with your question.
Customer: replied 1 year ago.
I didn't know that a 1978 mercury 402 40hp outboard had a thermostat.
Expert:  Joe replied 1 year ago.
Can you provide the serial number by chance please?

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