Hello Everyone, Bought a Pearson 30 and haven't been happy with the proformance. Now I don't claim to know alot about engines but I'm at 1200 rpm's getting 5.5 knots and plenty of throttle to go... That's max speed, I can get more rpm's but the speed dosen't increase.... I just had new plugs, points etc.. put in and S.O.S... I would like to know what is the proper dia. and pitch for a three bladed prop. Thanks for all your replys and help... Paul