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I have a 1981 Stingray with a 470 in it and it always runs about 170 or 180 degrees. I recently rebuilt the motor due to over heating it and don't like to see it run that hot. I am planning on putting the 4" heat exchanger on but have not located one in my price range. Would a engine oil...
I just had my rebuilt 470 put back in the boat and it runs great above 1400 RPM, below that it has a clunking sound that sounds like a motor mount with no rubber insert. After investigating I found the fiber washer is above the motor mount attached to the motor not between the motor and transom...
