Ensure optimal performance and reliability for your marine vessel with the genuine Mercury GCM480801 Diesel Engine Control Module (ECM/ECU). Engineered specifically for Mercury marine diesel engines, this computer module serves as the central processing unit for your engine, precisely managing critical functions to maximize power and fuel efficiency. Built to withstand harsh marine environments, the module features a rugged, sealed aluminum housing that protects sensitive internal electronics from moisture, salt corrosion, and heavy vibrations. It is equipped with a dual multi-pin electrical connector interface (two rectangular receptacles) ensuring a secure, watertight connection to your vessel’s wiring harness. Complete with factory-machined mounting holes and alignment cutouts for straightforward installation, this ECM is the perfect direct-fit replacement for maintaining your Mercury diesel engine.