Yamaha Lower Unit Assy - 6FM-45300-02-8D. The Yamaha Lower Unit Assy - 6FM-45300-02-8D is meticulously designed to deliver outstanding performance and reliability for your Yamaha outboard motor. This lower unit assembly ensures a precise fit and optimal functionality, significantly enhancing your marine engine's overall efficiency. Constructed with high-quality materials, it is built to withstand the challenges of marine environments, offering exceptional durability and consistent performance.. Experience smooth and efficient power transmission with the Yamaha Lower Unit Assy - 6FM-45300-02-8D, minimizing drag and maximizing thrust for improved fuel economy and a smoother ride. Trust in Yamaha's dedication to quality and innovation with this lower unit assembly, ensuring your boat performs at its peak in various conditions, providing you with a reliable and enjoyable boating experience.. 6FM-45300-02-8D - LOWER UNIT ASSY