Yamaha Lower Unit Assy - 6GR-45300-05-CE. The Yamaha Lower Unit Assy - 6GR-45300-05-CE is expertly engineered to deliver exceptional 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 from high-quality materials, it is designed to withstand the harshest marine conditions, providing long-lasting durability and consistent performance.. With the Yamaha Lower Unit Assy - 6GR-45300-05-CE, you can experience smooth and efficient power transmission that minimizes drag and maximizes thrust. This results in improved fuel economy and a smoother ride on the water. Trust in Yamaha's commitment to quality and innovation with this lower unit assembly, ensuring your boat operates at its peak in all conditions, delivering a reliable and enjoyable boating experience.. This product has been superseded by: 6GR-45300-06-CE. 6GR-45300-05-CE - LOWER