The key to the 191's performance advantage is the reverse transom. Far more than just a styling exercise, moving extra displacement aft of the engine's mounting point offsets the additional weight of a modern four-stroke outboard, keeping the boat stable at rest and enhancing on-plane running performance. A stepped section allows the boat to pivot and plane quicker, and reduces wetted surface area and drag at planing speeds. The end result of this clever engineering is a 19-foot fishing boat that performs well on a 90 hp outboard, but can also shoulder a 150 hp four-stroke. Our test boat was rigged with a 90 hp Yamaha, which delivered ample acceleration and pushed top end to better than 40 mph in windy conditions.