19279-ZW9-010 Flush Valve Spring - Overview. The 19279-ZW9-010 Flush Valve Spring is a vital component within Honda marine engine systems, designed specifically for the flush valve system. This spring ensures the proper operation and sealing of the flush valve, playing a crucial role in maintaining the engine's optimal performance and longevity. Manufactured to stringent factory specifications, it guarantees seamless integration with existing parts and systems, maintaining Honda's renowned relia