Yamaha Lower Unit Assembly - 6E7-45300-15-EK. The Yamaha Lower Unit Assembly - 6E7-45300-15-EK is an essential component designed to maintain the peak performance of your Yamaha outboard motor. Constructed from high-quality materials, this lower unit assembly ensures excellent resistance to corrosion and wear, providing durability and reliability in various marine conditions. Its precise engineering guarantees a perfect fit and smooth operation, making it a top choice for both recreational and professional boating needs.. Designed for straightforward installation, the Yamaha Lower Unit Assembly - 6E7-45300-15-EK integrates effortlessly with your existing motor setup. This robust assembly enhances overall motor efficiency, ensuring your engine operates smoothly and reliably. Trust in Yamaha's commitment to quality and engineering excellence with this dependable lower unit assembly, built to withstand the demands of harsh marine environments and keep your boating adventures running smoot