MAGNETEK-REPLACEMENT FOR POLARIS PB-4 BOOSTER PUMP (BRASS COUPLING SHAFT EXTENTION NOT NEEDED) 56CZ FRAME THREADED SHAFT CATALOG # B625 PART # 7-173840-23 ….. HORSEPOWER LABEL HORSEPOWER: 3/4 SERVICE FACTOR: 1.5 EFFECTIVE HORSEPOWER: 1.125 ….. DIMENSIONS LENGTH: 10″ EXCLUDING SHAFT SHAFT LENGTH: 3 3/4″ DIAMETER: 6 1/2″ ….. CAPACITOR START CAPACITOR 124-149 UF 110 VAC MOUNTED ON TOP OF THE MOTOR