Yamaha Lower Unit Assy 6HC-45300-03-8D - Ensure optimal performance for your boat with the Yamaha Lower Unit Assy 6HC-45300-03-8D. This high-quality lower unit assembly is engineered for durability and efficiency, making it a reliable choice for marine enthusiasts.. The Yamaha Lower Unit Assy 6HC-45300-03-8D is constructed with superior materials to withstand harsh marine conditions. Its precise engineering and easy installation process provide a perfect fit, ensuring smooth and reliable operation for your boating adventures.. 6HC-45300-03-8D - LOWER UNIT ASSY