Yamaha Lower Unit Assy - 6FM-45300-22-8D. The Yamaha Lower Unit Assy - 6FM-45300-22-8D is meticulously crafted to deliver exceptional performance and reliability for your Yamaha outboard motor. This lower unit assembly ensures a perfect fit and optimal operation, significantly enhancing the overall efficiency of your marine engine. Made from high-quality materials, it is designed to withstand harsh marine conditions, providing long-lasting durability and dependable performance.. With the Yamaha Lower Unit Assy - 6FM-45300-22-8D, you can enjoy smooth and efficient power transmission that minimizes drag and maximizes thrust. This results in improved fuel economy and a smoother ride on the water. Rely on Yamaha's commitment to quality and innovation with this lower unit assembly, ensuring your boat performs at its best in all conditions, delivering a reliable and enjoyable boating experience.. 6FM-45300-22-8D - LOWER UNIT ASSY