Product Type: Capacitor StartHP: 1-1/2RPM: 3450Volts: 115/208-230Amps: 8.3/8/16Hz: 60Phase: 1Frame: 56CEnclosure Type: TEFC (Totally Enclosed Fan Cooled)Enclosure Material: SteelMounting: C-Face/RigidMotor Diameter: 6-1/2"Shaft Diameter: 5/8" KeyedShaft Length: 1-7/8"Rotation: ReversibleNumber of Speeds: 1Service Factor (SF): 1.15Bearings: BallThermal Protection: NoneMaximum Ambient Temperature: 40° CInsulation Class: BDuty Cycle: ContinuousCapacitor: IncludedB891 is listed in Century's cross reference as a possible substitute for the following: A.O. Smith 193059, A.O. Smith B778, A.O. Smith C56M2E101, A.O. Smith C56M2UE100, A.O. Smith C56M2UE107, Century 159493, Century 193059, GE C336, Leeson 110909, Marathon K631, Marathon V56B34F5324, Marathon G530, Century 193058