Yamaha Lower Unit Assy - 6E0-45300-05-8D. The Yamaha Lower Unit Assy - 6E0-45300-05-8D is designed for optimal performance and reliability in your Yamaha outboard motor. This unit is precision-engineered to ensure seamless integration and maximum efficiency, enhancing the overall performance of your marine engine. Built with premium materials, it is resistant to the harsh conditions of marine environments, ensuring long-lasting durability and dependable functionality.. The Yamaha Lower Unit Assy - 6E0-45300-05-8D is crafted to provide smooth and efficient power transmission, minimizing drag and maximizing thrust. This results in better fuel economy and a more enjoyable boating experience. With Yamaha's renowned commitment to quality and excellence, this lower unit assembly will help your boat perform at its peak in all conditions.. 6E0-45300-05-8D - LOWER UNIT ASSY