I hope I can explain this right, I got a 1994 21' Sun Tracker Fishin Barge with a 2000 75 hp Mercury. I had a stainless steel 14x19p prop. The engine ran fine but I was only able to get 22.5 mph out of it. After talking with 2 dealers and countless other people they all suggested that I should go to a 14 x13p to get better power and way more MPH. Well I went out and bought an aluminum 14x13p and now the engine sounds alot smoother but I still am only running 22.5 mph. My question is did I make the right move with the prop? Should this boat be faster or am I just SOL. BTW my friend has a 24' Harris float boat with a 40hp Evinrude that runs just as fast. HELP!