I have a 6.1m/20 feet daycruiser weighing about 1.1 tons/2400 lbs fitted with a Yamaha 200 HPDI. I need a new prop, i used to have a ballistic 14 3/8x21 3 blade. Although the boat went fine with that prop, acceleration pretty good and about 48knots in top speed, it would be fun trying something else, what about a four blade? Any ideas?<br /><br />Thanks,<br />Mattias