The 400R is the first Mercury Racing outboard to feature Joystick Piloting for Outboards (JPO) technology. Joystick Piloting takes the stress out of docking, maneuvering in tight spaces and operating in tight quarters by providing boaters 360-degree movement at their fingertips. The intuitive design of the joystick lets anyone maneuver large boats with ease and confidence. JPO 400R models are available exclusively with cambered Sport Master gearcases. Mercury Digital Throttle and Shift (DTS) replaces the lag and hesitation of traditional throttle and shift cables with digital precision, resulting in smooth shifting and instant throttle response.