1987 V20 with a 1990 Yamaha 150

[bigshrimpin]

To answer your question . . . it depends on what prop, the condition the prop and motor, and whether or not the outboard is set at the correct height. The stock 17pitch aluminum Yamaha prop 14" x 17 and yamaha 150 will push the steplift around 40. This estimate assumes the condition of the motor and the prop are in good shape and the height of the motor is set correctly. If you mess around with different props, you can go faster. I've been told that you should prop that motor at 5500rpm WOT.