Need some help with this-97 Jag with a 200 merchole shot is good top end loaded with gear, fuel, and two people- gps 63 mphrunning a four blade merc prop 25 pitch w/extra cupturning max 6100 rpmsusing a 6 inch jack platewas using a four blade merc 25 pitch prop with regular cup with same results as above except could turn 6400 rpmsI would love some help, am I way off with my numbers, since I am setting it up at the boats heaviest.ThanksRalph