Re: 150 Yamaha OB
did you run the boat before purchase?? I would guess that a 150 would probably push that boat into the 40 MPH range, with decent take off power for skiing/tubing. Does boat have trim tabs? these will help get up on a plane quickly. I see a lot of 200-225 motors on 21'-23' boats. I guess it depends on how you will use the boat, and what you want it to do. make sure it is propped right.