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this motor will only turn 4200 rpms it seems a little cold natured at first sometimes motor shakes in excess like its missing other times it runs fine but will never turn more than 4200 rpms ive tried several props 21p down to 15p and the rpms have not changed checked compression and all 4 cyl...
This motor will only turn 4200 rpm and boat will run 40mph at wot. The engine plate says it should turn 4500 - 5500rpm and 140hp @5000rpm. At first it had a 21 pich prop and i was told it was probably just a prop issue so i put a 19 pich on, no change in rpm so i went down to 17 pich prop no...
