Mercury - ECM - Fits 2002-2004 MCM 350 Mag MPI Alpha with Closed Cooling - 77-865839T03 Mercury-200HP-Verado-4-CYL-2023 It manages engine data communication

It manages engine data communication between Mercury diesel mechanical sterndrive engines and helm monitoring systems

guarding the parts you depend on most

Q3: Will this improve performance on older engines

marine-ready output at twelve volts and sixty-five amps

Mercury - ECM - Fits 2002-2004 MCM 350 Mag MPI Alpha with Closed Cooling - 77-865839T03 Mercury-200HP-Verado-4-CYL-2023 It manages engine data communicationFits: 2002 2004 MCM 350 Mag MPI Alpha with closed cooling (s n 0M600000 0W309999) WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.