Yamaha - Gear Set Lower Unit Gear Component 6CE-45550-00-00. Overview. The Yamaha Gear Set 6CE-45550-00-00 is a complete gear assembly designed to ensure smooth and efficient power transfer within your outboard's lower unit. This set works together to deliver consistent propulsion, proper gear ratios, and reliable shifting performance. When gears become worn or damaged, you may notice grinding, slipping, or reduced efficiency. Replacing the full gear set is often the best way to restore performance and protect the rest of the drivetrain.. Key Features. • Complete Gear Assembly - Includes multiple gears designed to work together for optimal performance.. • OEM Fit Precision - Manufactured to Yamaha specifications for exact alignment and reliable operation.. • Smooth Power Transfer - Ensures consistent propulsion and efficient gear engagement.. • Heavy-Duty Construction - Built to handle torque, pressure, and harsh marine environments.. Engine & Boat Compatibility. Verify compatibility w