I run a 23m 14 1/2 Yamaha prop on my 97 150, rpms varied from 5200-5400 depending on weather, speed anywhere from 55-57. Purchased a spare prop that is the same and was reworked before purchase, tried it yesterday in the cool weather so I should have seen my max speed of 57.
I could only manage 53-54 but turning 5400 rpm, what is wrong or different between the two which would cause me to lose the top end but keep RPM? Pitch be off, cupping?
I'm no expert by any means so any info appreciated.