Quote:
Originally Posted by rivrunner
Hi Mike....thks for the thought.....checked the prop and it's in very sturdy and neither i or the previous owner ever hit anything
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Well the previous owners says that! Even catching it on a rope can sometimes be enough. If the previous owner is around can he shed any light on your issues?
My guess is you have a fuel problem so not developing max power (dirty carb, blocked filter etc). Accurate diagnosis is impossible without more info. I'd suggest getting a TinyTach (or copy on ebay for a tenner) because: 1. it will help you identify the problem, 2. it will be useful in the future, 3. it will help you select the best prop in the future, 4. keeping an eye on running hours is useful, as can tracking trends on revs.
I wouldn't rule out the prop slipping on the bush, although I think its not the most obvious issue. You can't usually spin it easily by hand - make a mark with something like tipex covering both the prop and the shaft/nut. Take it for a run and then see if the lines still match up perfectly.