Yamaha Lower Unit Assembly 689-45300-05-EK - Optimize your outboard motor's performance with this genuine Yamaha lower unit assembly. Expertly crafted from high-quality materials, this assembly is designed to deliver exceptional durability and reliability in various marine environments. Its robust construction ensures excellent resistance to wear and corrosion, providing smooth and long-lasting operation for your vessel.. The Yamaha Lower Unit Assembly 689-45300-05-EK offers efficient power transfer and superior stability, enhancing your boat's overall performance. Ideal for both professional and recreational boaters, this assembly helps maintain your outboard motor's peak efficiency. Trust in Yamaha's dedication to quality and innovation to keep your marine engine running optimally, ensuring a dependable and exceptional boating experience every time you set sail.. This product has been superseded by: 689-45300-07-EK. 689-45300-05-EK - LOWER UNIT ASSY