Yamaha Lower Unit Assembly 61B-45300-22-4D - Upgrade your outboard motor with this genuine Yamaha lower unit assembly. Meticulously engineered and constructed from premium materials, this assembly offers outstanding durability and reliability in diverse marine environments. Its sturdy design ensures excellent resistance to wear and corrosion, providing long-lasting performance for your boating needs.. The Yamaha Lower Unit Assembly 61B-45300-22-4D enhances your vessel's performance with smooth and efficient power transfer. Suitable for both professional and recreational boaters, this assembly ensures your outboard motor operates at peak efficiency. Rely on Yamaha's commitment to quality and innovation to keep your marine engine in top condition, delivering a superior and dependable boating experience every time you set out on the water.. This product has been superseded by: 61B-45300-22-8D. 61B-45300-22-4D - LOWER UNIT ASSY