Yamaha Lower Unit Assembly - 68U-45300-12-4DThis product has been superseded by: 68U 45300 12 8D Yamaha Lower Unit Assembly Gearcase Component 68U 45300 12 4D Overview The lower unit assembly is one of the most critical components of your Yamaha outboard, responsible for transferring engine power to the propeller. This assembly ensures smooth and efficient propulsion by housing the gears, driveshaft, and internal mechanisms needed for forward, neutral, and reverse operation. Built with high
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