Nordyne/Miller universal burner motor replaces 304175000 and 305662000. Also replaces Duo-Therm H-9171 & 3-9171. 115V, 3000 RPM, 1/30hp. Also known as an AO Smith 357 motor and JA1M744NV. Motor measures 4.75" long x 3.25" diameter. Shaft measures 1.25" long x 1/4" diameter. 3 mounting bolts are secured to the side of motor. Also includes 2 mounting screws for the end. Black wires are for motor, green is ground, red wires are for centrifugal switch. Switch not sold separately. Used in MC-8, MC-8-C gas burners found in MGC-80, MGC-100, MGC-60-1, MGC-80-1 & MGC-100-1 furnaces. Also used as a booster motor in some Duotherm furnaces. May also fit other furnaces, call for a cross-reference.