Yamaha - Shaft, propeller - 6AX-45611-00-00Yamaha Propeller Shaft Lower Unit Drivetrain 6AX 45611 00 00 Overview This is the backbone of your lower unitthe part that actually spins the prop and pushes you through the water. When its straight and solid, everything feels smooth and predictable. But once a shaft gets bent or worn, youll notice vibration, noise, or even seal issues pretty quick. Yamaha builds these to take real world hits and torque, whether you're cruising long runs or working in