Mercury Fuel Injector - 4.5L & 6.2L MPI MerCruiser - 8M0222144. Mercury - Fuel Injector - 8M0222144. Maintain proper fuel delivery and engine performance with this genuine Mercury fuel injector designed for 4.5L and 6.2L MPI MerCruiser sterndrive engines. Precision-engineered for multi-port injection systems, this injector helps deliver accurate fuel atomization for smooth idle, responsive throttle input, and consistent power output.. If you are experiencing rough running, hesitation, or fuel delivery issues, a properly functioning injector is critical to restoring balanced cylinder performance and overall engine efficiency.. Key Features. Genuine Mercury fuel injector. Designed for 4.5L and 6.2L MPI MerCruiser sterndrive engines. Supports precise multi-port fuel delivery. Helps maintain smooth idle and throttle response. Built to OEM specifications for proper fit and function. OEM Part Number: 8M0222144. Engine Compatibility. For use on 4.5L and 6.2L MPI (Multi-Port Injection) MerCrui