Yamaha Lower Unit Assy 6H3-45300-EA-8D - Optimize your boat's performance with the Yamaha Lower Unit Assy 6H3-45300-EA-8D. This lower unit assembly is designed for superior power transfer and seamless operation in all marine environments.. The Yamaha Lower Unit Assy 6H3-45300-EA-8D features high-quality construction for exceptional durability and resistance to corrosion. With precise engineering for a perfect fit and easy installation, this lower unit assembly is a reliable choice for both recreational and professional boaters.. 6H3-45300-EA-8D - LOWER UNIT ASSY