17621-ZV0-010 Fuel Cap Body - Overview. The 17621-ZV0-010 Fuel Cap Body is a vital component within Honda marine engine systems. It is specifically designed to house and securely seal the fuel cap on your boat's fuel tank, ensuring the fuel system remains closed and protected from contaminants and evaporation. Engineered to match factory specifications, this part guarantees seamless integration with existing components, maintaining optimal performance and durability.. Key Features. OEM genuine H