Yamaha Lower Unit Assy 6H1-45300-17-8D - Ensure optimal performance and reliability with the Yamaha Lower Unit Assy 6H1-45300-17-8D. This high-quality lower unit assembly is designed to deliver smooth power transfer, enhancing your boating experience.. The Yamaha Lower Unit Assy 6H1-45300-17-8D is built with durable materials, providing excellent longevity and resistance to wear. Perfect for both casual and professional boating, this lower unit assembly offers easy maintenance and consistent performance, ensuring your boat runs efficiently on every trip.. 6H1-45300-17-8D - LOWER UNIT ASSY