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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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I have twin 1998 5.7s, this season temp fluctuates between

Customer Question

I have twin 1998 5.7s, this season temp fluctuates between 120 and 150 on both, previous always stayed around 180, changed thermostat, sender, raw and circulating pumps, checked gauge, working properly
Submitted: 1 year ago.
Category: Boat
Expert:  Jason replied 1 year ago.

Hi John, my name is Jason.

Are these engines raw water cooled, or freshwater cooled with a heat exchanger and antifreeze?

Did you verify the temps by using an IR temp gun and scan the temperatures of the thermostat housing?

Expert:  Jason replied 1 year ago.

Are you with me John?

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