16730-ZZ5-013 Vapor Separator - Overview. The 16730-ZZ5-013 Vapor Separator is a critical component of Honda marine engine fuel systems. Its primary role is to efficiently separate fuel vapor from the liquid fuel before it reaches the engine, ensuring a consistent and reliable fuel supply. This function helps prevent vapor lock conditions and contributes to optimal engine performance and fuel efficiency. Engineered specifically for Honda marine engines, this vapor separator ensures seamless inte