16730-ZZ3-043 Vapor Separator - Overview. The 16730-ZZ3-043 Vapor Separator is a critical component within the Honda marine engine fuel system. This OEM part is designed to isolate and remove vapor from the fuel, ensuring that only liquid fuel passes to the engine for optimal combustion. By preventing vapor lock and fuel flow interruptions, the vapor separator supports reliable engine starting and smooth operation across a wide range of conditions. Engineered to precise factory specifications, i