Yamaha Lower Unit Assy 6HC-45300-01-8D - Keep your boat running smoothly with the Yamaha Lower Unit Assy 6HC-45300-01-8D. Designed for optimal performance and durability, this lower unit assembly ensures reliable operation in various marine conditions.. The Yamaha Lower Unit Assy 6HC-45300-01-8D is constructed with high-quality materials for excellent resistance to wear and corrosion. Its precise engineering and easy installation make it an excellent choice for maintaining your boat's efficiency and longevity.. This product has been superseded by: 6HC-45300-03-8D. 6HC-45300-01-8D - LOWER UNIT ASSY