I have a 1999 Eliminator 280 eagle with a merc 502/Bravo 1 drive that has a 4 blade 24P S.S. prop. that tops out at about 4000 rpm @ WOT and about 4200 if trimmed. At this rpm, boat speed is about 48-52mph. I've check the throttle cable/linkages and found no binding (Butterfly flaps open full...