Yamaha - Gear Internal Drivetrain Component 6FM-45560-00-00. Overview. The Yamaha Gear 6FM-45560-00-00 is one of those internal parts that keeps everything turning smoothly behind the scenes. When a gear starts to wear or chip, you'll usually hear it before anything else-extra noise, rough operation, or inconsistent performance. It plays a key role in transferring power through the system, so it needs to stay properly aligned and in good shape. If you're already inside the lower unit or engine, this is one of those parts worth replacing to avoid bigger issues later.. Key Features. • Reliable Power Transfer - Moves rotational force between components for smooth and consistent operation.. • OEM Fit Precision - Built to Yamaha specifications for proper gear meshing and alignment.. • Smooth Operation Support - Helps reduce friction and unwanted noise during use.. • Durable Load Handling - Designed to withstand continuous torque and marine operating conditions.. Compatibility. Compatible wi