Yamaha Lower Unit Assy - 6EK-45300-12-8D. The Yamaha Lower Unit Assy - 6EK-45300-12-8D is meticulously engineered to enhance the performance and reliability of your Yamaha outboard engine. This genuine Yamaha part ensures a precise fit and smooth integration with your engine system, providing optimal functionality. Constructed from high-quality materials, it offers exceptional durability and strength, capable of withstanding the rigorous conditions of both freshwater and saltwater environments.. Experience improved power transmission and dependable performance with the Yamaha Lower Unit Assy - 6EK-45300-12-8D. Yamaha's commitment to quality and innovation is evident in this lower unit assembly, ensuring your outboard engine operates at its best. Whether you're cruising, fishing, or participating in water sports, this lower unit assembly delivers the reliability and efficiency needed for a smooth and enjoyable marine experience.. This product has been superseded by: 6EK-45300-13-8D. 6EK