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Need advice on 96 Merc

M

mustwatchtv

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96 Mercury 40hp 4cyl 2 stroke, impeller stopped working engine overheating and now I got 110psi on all cylinders except for #3 75psi (thinking rings)I did a wet cylinder test and it went to 115psi, My question is should I attempt to rebuild this motor I've been working on motors since I was 13 but never to this extent I'm also on a fixed income so I really can't afford another motor or to have a outboard mechanic fix this motor.
Any advice would be very appreciated
 
You could remove intake bypass covers to have a look at the pistons / rings.----Other that that it is simple nuts / bolts work.
 
Bore scope the cylinders through the spark plug hole and have a look for scoring. To me, its worth rebuilding because it's one of the best engines Mercury ever made 1955-1998, I have a 1995 I bought new and still purrs like a kitten. Lot's of parts are still available.
 
fitz73222 said:
Bore scope the cylinders through the spark plug hole and have a look for scoring. To me, its worth rebuilding because it's one of the best engines Mercury ever made 1955-1998, I have a 1995 I bought new and still purrs like a kitten. Lot's of parts are still available.
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Will do and thanks for the advice
 
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