I have a 2002 60 hp. elpfi 4-stroke Mercury Bigfoot.<br />Boat is a 22' Crest pontoon. <br />Prop is 13" pitch. Dia is 14 I think.. Whatever the Big Foot runs.<br /><br />I am only seeing 2400 rpms at wot. Loaded pretty good. Speed is 15.5 mph on GPS.<br /><br />Is the prop that far off or is...