hello all i also have this posted in the prop forum... i have a 19 ft 1988 regal sebring w a mercruiser 140 i/o 14.5x17 prop... the boat is only reving at WOT 4050 rpms!!!... i just did a complete tune up ..plugs wires,cap, rotor, condensor,points,coil, and fuel filter, points set a .022...i...