17629-ZV0-000 Fuel Cap Spring - Overview. The 17629-ZV0-000 Fuel Cap Spring is a small yet vital component in Honda marine engine systems, specifically designed for the fuel system. This spring maintains the correct tension on the fuel cap assembly, ensuring the fuel cap remains tightly closed to prevent fuel spills, evaporation, and contamination. By doing so, it supports the marine engine's operational reliability and safety, safeguarding fuel integrity.. Key Features. Precisely manufactured s