17620-ZW6-E11 Fuel Tank Cap Assembly - Overview. The 17620-ZW6-E11 Fuel Tank Cap Assembly is an essential component of Honda marine engine systems. It plays a critical role in sealing the fuel tank to prevent leaks and maintaining proper pressure within the fuel system. Designed specifically for Honda Marine outboard engines like the BF2.3D, this fuel cap assembly ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda fu