I have a 1995 3.0LX Alpha One (181 CID) 4 cylinder, 135 horsepower (the lower drive is Alpha 1.98 ratio B) in a Larson SEi 174 (17.5 foot) bowrider. I bought the boat used and my WOT rpm is only 2200 (book says 4400 - 4800) and at the 2200 rpm it does 43 mph. This is with a 4 blade 14 x 20 pitch...
