Yamaha Lower Unit Assembly 677-45300-12-8D - Elevate your outboard motor's performance with this genuine Yamaha lower unit assembly. Engineered with precision and constructed from high-quality materials, this assembly ensures exceptional durability and reliability in various marine environments. Its robust design offers excellent resistance to wear and corrosion, guaranteeing smooth and long-lasting operation for your vessel.. The Yamaha Lower Unit Assembly 677-45300-12-8D provides 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, delivering a dependable and exceptional boating experience every time you set sail.. This product has been superseded by: 677-45300-13-8D. 677-45300-12-8D - LOWER UNIT ASSY