I have a 2002 Monterey 228 ss. The boat weighs 3700 lbs, It currently has a 14.25 with 21 pitch aluminum prop. The boat has a 5.7 Volvo GI with 280hp with SX drive says the ratio is 1.43. I had the boat out this weekend and I am only getting about 4300 rpms. I live in Kansas altitude of 2700ft...
