HP500 (carbed) rebuilding
#11
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Join Date: Apr 2002
Location: wisconsin
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I had a tie bar lifter failure on one engine at 370 hours so I had to freshen that engine because of the metal in the motor. Then I replaced springs and lifters and cam in the other engine, changing to a style of lifters that did not use a tie bar. Currently I have one engine with 700 hrs on that engine without doing anything else to it. Running 30 weight I have good oil pressure using 1 qt every 20-25 hours.
#13
Charter Member # 55
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I would do leak down first to determine where the leakage is. Most likely top ends.
Assuming the bottom end is good, I would do full top ends and change the cam and lifters.
Bob M (rmbuilder) or Eddie Young can hook you up with all the needed parts.
Assuming the bottom end is good, I would do full top ends and change the cam and lifters.
Bob M (rmbuilder) or Eddie Young can hook you up with all the needed parts.
#15
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if they are factory sealed motors you are probably better off not having someone rebuild the bottom end anyway. Theres a reason mercruiser engines cost what they do, they keep really nice tolerances and the correct ones for marine use.
Not saying that having an engine rebuilt is always a bad idea... just that there is always a chance of human error during assembly and measurement
Not saying that having an engine rebuilt is always a bad idea... just that there is always a chance of human error during assembly and measurement