I know this won’t be for everybody, but I have been completely thrilled with how the S4 has performed with the motor configuration I used. I bought a 15 inch shaft 6 HP motor and ended up raising the transom so that the bottom of the motor’s skeg is only 6 inches below the hulls. I fish very shallow water and can run full speed in basically ankle-deep water. The prop is high enough that it would cut through the hull on a turn so I had to attach a carefully sized piece of polyethene to the motor to prevent the prop from getting to close to the hull. I am getting 13 mph top speed with this set-up. 