This Mercury Mercruiser Retainer 92817-C or 79448 Washer Lock Ring is a crucial component for any boat's transmission and drive system. It is specifically designed for Mercury brand engines and is a must-have for any boat owner who wants to ensure their engine's proper functioning. Made from high-quality materials, this washer lock ring is durable and long-lasting. It is perfect for those who want to replace their old and worn-out ring without having to worry about the quality of the product. With its easy installation process, this Mercury Mercruiser Retainer is a hassle-free solution for any boat owner who wants to keep their engine running smoothly.