The Genuine Tohatsu Marine Part is a Head Gasket Set with part numbers 397-87121-0 and 363-87121-1. This set is specifically designed for Tohatsu outboard motors and is used to seal the cylinder head to the engine block, ensuring proper compression and preventing any leakage of gases or fluids. Made with high-quality materials, this head gasket set guarantees a reliable and durable seal, providing optimal performance and protection for your Tohatsu marine engine. Whether you are replacing a worn-out gasket or performing routine maintenance, this Genuine Tohatsu Marine Part is the perfect choice to keep your outboard motor running smoothly and efficiently.