I've got a 99 Ranger R83 with above said motor, took it to tech to have engine checked out before I went on a trip to KY Lake. Tech said motor had been run in above 5050 rpms 0% of operating time (205hrs). I personally topped her out 2 years ago @ 64.7 gps, with myself, half tank of fuel. Last fall I topped her out with my partner, full tank, @59mph. Guys in the setup forum tell me thats impossible with the prop slip calc. What exactly does 0% mean on the outboards memory? This past weekend I topped out 54@ 5100 rpms.trimmed almost all the way up, with two guys, 3/4tank, and 20+mph headwind/crosswind. My prop is a 23" Renegade with a couple of small nicks and stuff. What gearcase am I running? I could apparently use some more rpms!!??