17620-ZW6-030 Fuel Tank Cap Assembly - Overview. The 17620-ZW6-030 Fuel Tank Cap Assembly is an essential component of Honda marine engine systems. It serves to securely close and seal the fuel tank, preventing leaks and contamination, thus ensuring reliable engine operation. Designed to meet Honda's exact factory specifications, it fits seamlessly with existing fuel tank components, maintaining optimal performance and durability.. Key Features. OEM genuine Honda part ensuring perfect compatibil