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outboard motor power problem

1052 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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Mercury Engine


I had a similar problem with my engine. As others have stated check the prop first. If you have an internal tank and a fuel water separator check that also. That was my problem. I had water in my tank. If that is the case you would have to drain the fuel and perhaps even have your carbs cleaned. My engine was a 90HP Mercury. Good Luck
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