Yamaha Lower Unit Assembly 61B-45300-21-EK - Enhance your outboard motor's performance with this genuine Yamaha lower unit assembly. Designed with precision engineering and built from high-quality materials, this lower unit assembly guarantees exceptional durability and reliability in various marine environments. Its robust construction provides excellent resistance to wear and corrosion, ensuring long-lasting performance.. The Yamaha Lower Unit Assembly 61B-45300-21-EK ensures smooth and efficient power transfer, enhancing your vessel's overall performance and stability. Ideal for both professional and recreational boating, this assembly helps maintain your outboard motor's peak efficiency. Trust Yamaha's dedication to quality and innovation to keep your marine engine running smoothly, offering a superior boating experience every time you venture out on the water.. This product has been superseded by: 61B-45300-22-EK. 61B-45300-21-EK - LOWER UNIT ASSY