16450-ZY9-003 Fuel Injector Assembly - Overview. The 16450-ZY9-003 Fuel Injector Assembly is an essential part of Honda marine engine systems, specifically designed for fuel injection. It plays a critical role in accurately metering and delivering fuel to the combustion chamber, ensuring the engine operates efficiently and reliably. This assembly supports the fuel delivery system and maintains smooth engine performance. Manufactured to OEM specifications, it fits seamlessly with existing compone