Response to I have a 7-187400-20, Century Centurion, AO Smith, 3/4HP pump that just hums. When I turn the exposed end of the axle with my fingers it will start. It runs quiet. But it will not start by itself. Is this the Capacitor and which spec do I need? The motor is 230/115V, 6.5/13amps 3450RPM.
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