Mercury - Bow Thruster Assembly for Single-Engine Pontoon JPO Control System 8M4510397. OverviewThis bow thruster assembly gives single-engine pontoons the extra control they need when you're sliding into a slip or dealing with wind across the bow. It ties into the Joystick Piloting system so the boat responds smoothly instead of drifting or fighting you. The unit delivers steady lateral push, which helps big pontoons feel more manageable in tight marinas. Once installed, low-speed work feels ca