This cast aluminum offset type jack plate is designed for clamp-on mount outboard motors up to 35 HP. Improves performance and handling of smaller or lighter boats. The T-H Marine Mini-Jacker also allows mounting of long shaft motors to shorter shaft transom boats. Mounts to boat transom with bolts and then the engine is simply clamped and/or bolted on. The Mini-Jacker stands off transom 4. The engine mounting surface is 11.5W x 10H and features a vertical offset of 3. The overall width of transom mounting flange is 17. Mounting hardware not included. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Jacks.