Old GE electric motor runs intermittently.

[expatriot98]

I have an old attic fan I want to convert to a mobile shop fan. It has a 1/3 HP motor that when powered buzzes until the pulley is spun by hand, then turns on and off intermittently. Pic of the tag - not that it makes any difference. The unit is from the mid 50's and there is no external capacitor mounted. Any help is appreciated.

[908/930]

Not an expert, but I think some older motors have some sort of centrifugal starting circuit switch that changes the windings from start to run, open it up and take a look.

[Brian 162]

The start winding is worn out. Time for a new motor.

[billybek]

Might be bearings.
Bearings dragging, hard start, trips on thermals.
Bearings dragging while running? Pulls higher amps, trips on thermals.
Belt driven? Alignment and belt tension make a difference too.
Do you have an ammeter? (clamp on)

From the looks of that one, you got your moneys worth long ago!

[1990C4S]

I'm guessing starting winding too.

I would take it apart and check the centrifugal switch, and continuity of the windings. It might be repairable, it might need a pull start added....

[expatriot98]

Thanks guys - I'm going to take it apart next chance i get.