Yamaha - 26 Tooth Gear Lower Unit Gear System 6AX-45560-02-00. Overview. Gears like this are what make the whole lower unit work without a second thought. When everything's lined up right, power flows clean and smooth, and you just feel solid performance on the water. But once a gear starts wearing or gets damaged, it doesn't stay quiet for long-you'll hear it and feel it under load. This Yamaha 26 tooth gear is built to handle that constant pressure and keep things turning the way they should.. Key Features. 26 Tooth Gear Design - Provides the correct ratio and engagement for proper lower unit operation.. Precision Cut Teeth - Ensures smooth meshing with mating gears to reduce noise and wear.. High Load Durability - Built to handle torque and continuous use in demanding marine conditions.. OEM Fitment Accuracy - Matches Yamaha specifications for proper alignment and performance.. Engine & Boat Compatibility. Designed for Yamaha outboard lower units utilizing this 26 tooth gear configu