Im pretty confused and need some expert advice on my prop. Ive got a 2007 21foot maxum cuddy with a 5litre mpi 260 hp engine. According to the dealer the pitch for my boat is a 17". Currently ive got a rev4 17" pitch 4 blade ss prop and im hitting the rev limiter at around 40knots with the trim up a bit. With this prop i get on plane great but i feel the speed can be more and definitely shouldnt be hitting 5300 rpm. after arguing that the prop they gave me cant be ideal they finally gave me some crappy blue demo prop i think its aluminum it only weighs maybe 5 lbs but its a 20"pitch 4 blade. Im guessing i need a 19 or 20" pitch to bring the rpm down about 5 or 6 hundred. I took the boat out twice now and im only able to reach 33 knots at around 5000-5100 rpm range. I dont think there was any point in even trying this prop since its at least 20lbs lighter than the ss prop i had on and i dont think ill be using anything other than a ss prop. Should i just stick with the 4 blade ss prop i have and use it when tubing etc, and buy a 3 blade for speed? If so what 3 blade prop should i get? Any help would be appreciated im not getting much from the dealership. Ideally i would like a prop weather 4 or 3 blade that gets on plane quick and gets be over 40 knots. we dont live in an ideal world but can i get close?
