16073-ZZ5-003 O-Ring - Overview. The 16073-ZZ5-003 O-Ring is a custom-made seal designed specifically for Honda marine engine systems. It plays a vital role in preventing leaks of fluids or gases within the fuel system, ensuring reliable and continuous operation of the engine. This O-ring is engineered to the exact factory specifications, providing seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precision O-ring designed to create a tight