Yamaha Lower Unit Assembly 61B-45300-20-EK - Optimize your outboard motor's performance with this genuine Yamaha lower unit assembly. Engineered for precision and built from high-quality materials, this assembly ensures exceptional durability and reliability. Its robust construction provides excellent resistance to wear and corrosion, making it ideal for various marine environments.. The Yamaha Lower Unit Assembly 61B-45300-20-EK offers smooth and efficient power transfer, enhancing the overall performance of your vessel. Perfect for both professional and recreational boating, it ensures your outboard motor operates at its best. Rely on Yamaha's commitment to quality and innovation to keep your marine engine in top condition, delivering a superior boating experience every time you set sail.. This product has been superseded by: 61B-45300-22-EK. 61B-45300-20-EK - LOWER UNIT ASSY