I have a 2001 bayliner 175 3.0 merc with a 2.0 alpha 1 gen2 outdrive I am currently running a 23 pitch 3 blade aluminum prop and top out at 42 mph GPS 1/2 full of fuel me and wife on boat. Sorry dont have the rpm been working on tach and going to have to replace it. The boat is used for tubing...