16730-ZY6-133 Vapor Separator - Overview. The 16730-ZY6-133 Vapor Separator is a vital component in Honda marine engine systems. It plays a crucial role in separating fuel vapors from liquid fuel, ensuring that only clean fuel reaches the engine. This efficient vapor separation helps optimize engine performance and prevent issues such as vapor lock that can degrade operation. Designed specifically for Honda engines, it ensures seamless integration with existing parts, maintaining optimal perform