OK START LAUGHING.... WE HAVE A PAIR OF PONTOON BOATS, ONE 20FT RUN 60. 150 MERC...ONE 24FT RUNS 65 WITH 285HP JOHNSON V6 3L , BUT THE 24 STARTS TO SKIP ABOUT 58 AND JUMPS AT 65 LIKE A JERSEY SPEED SKIFF FUN BUT VIOLENT.....DOES ANYBODY HAVE A SUGGESTIONS. SET BACK,PROP WHAT EVER...THE HULLS ARE MISTY HARBORS, THAT ARE TWO 30" WIDE SQUARE PONTOONS AND CONCAVEED IN THE MIDDLE TO TRAP AIR...THEY JUST GLIDE THRU THE WATER...... SILLYSANFORD