Pump Doesn't Pump....Just Hums

[Poconos]

Well, there is no governor. What they are referring to is the starter switch. There are two windings on these motors. A running and starting winding. The starting is in series with a capacitor. Once the motor comes up to speed the centrifugal switch opens the starting winding. A simple thing to try is when you turn on the pump, try whacking it with a piece of 2x4...not enough to dent anything. If it is dirty switch contacts it may start when you shock it. If it does, simple fix. Some 400 grit sandpaper. The switch is under the back cover. Can dig up a pic if needed.
Al
an additional note...if the capacitor was shorted or something is jamming the shaft, the hum would be quite loud and either a thermal breaker would open of whatever circuit breaker is feeding the pump would trip. i.e. high current.