Mercury - Joystick Piloting for Outboards: Single-Engine Pontoons Control System 8M0173266. OverviewThis JPO system gives single-engine pontoons a level of control that normally only multi-engine boats get. With the joystick in hand, the boat responds smoothly even when the wind or current is trying to push you around. It blends the outboard with the bow thruster so you can make slow, precise moves without juggling multiple controls. For big pontoons in tight marinas, it takes a lot of stress ou