Premium Replacement Ignition Coil for Mercury Inboard Engines (FM V-8 Engines)This ignition coil fits FM V-8 Engines With Delco HEI Ignition, Except MPI Engines With ECM 555.Replaces:MERCURY Ignition Coil 806673T1MERCURY Ignition Coil 806673MERCURY Ignition Coil 806673TSIERRA Ignition Coil 806673T*ARCO Assurance 12-month part and labor warranty protectionThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.