Yamaha - Gear - 68U-45560-00-00Yamaha Gear Lower Unit Drivetrain Component 68U 45560 00 00 Overview This is one of those internal pieces you dont think about until something feels off in the drive. The gear plays a direct role in transferring power from the engine down through the lower unit, and when its right, everything just runs smooth and quiet. When its worn, youll hear it before you see itgrinding, hesitation, or rough engagement. This is the kind of part you trust to hold