Fits 35-220 HP Mercury/Mariner outboards 1985 to 1992 3-Ram, 3-wire unit with side fill reservoir High performance cartridge pump with replaceable motor Interchangeable with Arco 6278, Mallory 9-18205, 9-18206, 9-18213, Mercury Marine 392-8995, 818186A6, 821821A2, 826729A07, 826729A08, 826729A09, 826729A10, 826729A4, 8M0143217, 99186, 991861, 99186T, and MES T1083M Each Sierra product meets or exceeds the original equipment part it replaces. Fit type: Universal Fit