Yamaha - Gear 1 (26T) Lower Unit Gear Component 6DA-45560-00-00. Overview. The Yamaha Gear 1 (26T) 6DA-45560-00-00 is a precision-engineered gear designed to ensure smooth and efficient power transfer within your outboard's lower unit. With its 26-tooth configuration, this gear plays a key role in maintaining proper gear ratios and delivering consistent propulsion. When gears begin to wear, you may notice noise, slipping, or reduced performance-this component helps restore proper operation and reliability.. Key Features. • 26-Tooth Gear Design - Optimized for proper gear ratio and smooth power transmission.. • OEM Fit Precision - Built to Yamaha specifications for accurate alignment and seamless integration.. • Reliable Power Transfer - Ensures consistent movement and efficient propulsion.. • High-Strength Construction - Designed to withstand torque, pressure, and harsh marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha engine model and part