Yamaha Lower Unit Assy - 6E0-45300-04-8D. The Yamaha Lower Unit Assy - 6E0-45300-04-8D is meticulously engineered to deliver outstanding performance and dependability for your Yamaha outboard motor. This lower unit assembly ensures a precise fit and optimal functionality, significantly boosting your marine engine's overall efficiency. Constructed from premium materials, it is designed to endure the toughest marine conditions, providing exceptional durability and reliable performance.. Featuring advanced engineering, the Yamaha Lower Unit Assy - 6E0-45300-04-8D ensures smooth and efficient power transmission, minimizing drag and maximizing thrust. This results in better fuel economy and a more enjoyable boating experience. Rely on Yamaha's commitment to quality and innovation with this lower unit assembly, ensuring your boat performs at its peak across various conditions.. This product has been superseded by: 6E0-45300-05-8D. 6E0-45300-04-8D - LOWER UNIT ASSY