4 strokes typically have longer strokes, and produce less horsepower than 2 strokes (mainly due to the rpm's of 2 strokes), but produce much more torque. More torque means a larger prop can be turned--apples to apples, the same sized 4 st has more torque than a 2 st, which means it will turn a bigger prop. That is fact. If you don't like 4 st, then that is fine, you don't ever have to buy one, but don't come on here talking about stuff that you don't know anything about. i own both 2 and 4 st, and much prefer the 4 st anyday!