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outboard motor power problem

1053 Views 9 Replies 7 Participants Last post by  frankji
I have an 88 mercury 50 I just had rebuilt. It starts well, idles well, pumps water etc. The only thing it doesn't do is push the boat if the rpms go over 2500. At lower rpm the boat moves forward slowly, at higher throttle, the engive revs up but there is no power to move the boat. I've looked at the prop, it looks good - no wear on the splines - it's only year old. I need some other ideas before I have to have them take it apart again!!
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re: your replies

thanks for the replies so far.
I will try the suggestion about using a different prop.
Boat is 17' cc with clean bottom.
Any other ideas out there?


It was indeed a spun hub. Tried my spare and everything is fine. I could not make the bad prop spin by hand though. Hi-torque necessary!
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