It is a 04 Commanche 21′ I havent run it all that much, I just bought it last summer and was told i could get a lot better performance from a better prop. I was told i needed a 21 pitch and could go with the 4 blade, so i did but it does not plane out. I used to run about 5500 rpm. About 6000+ at full throttle. Does that sound right? I dont know if it is my engine at this point or do i need a different prop.