I just picked up my new 21 Arima Hardtop. It has a 150 Honda 4-stroke. My question is for anyone who knows anything about props. Redline is 6000 rpm. It has a 4 blade 14.5 by 17 aluminum prop. Under WOT it revs up to about 5200. Then in order to reach 6000 rpm, I have to keep trimming...