4.3 liter mercruiser overheating

Don N

Recruit
Joined
Jun 20, 2007
Messages
1
engine over heats when idling but quickly cools down when running at 3/4 throttle. I checked t-stat and it opens ok. Right manifold seems to get hotter than left. Any ideas???
 

Haut Medoc

Supreme Mariner
Joined
Jun 29, 2004
Messages
10,645
Re: 4.3 liter mercruiser overheating

Welcome to iboats......:)
Without knowing the year, I will take a stab & reccomend that you replace your raw water impeller.......;)
That is an informed stab, btw.....:D
 
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