I have a 1996 Johnson 112 SPL on a 2003 Bone Boats 18 Cape Island (18'-6", 1600#, 48 gallon fuel, 30 gallon live well).<br /><br />With two adults, full fuel, full livewell and 100# gear, the boat is a slug getting on a plane, even with the trim tabs down. Currently, the prop is a 13 X 19. RPM...