Hello Che Kuan Yau,
I do not have a schematic. As far as I can tell there are no capacitors anywhere. I appreciate your offer of help but no longer necessary. After cleaning centrifugal switch, everything appears to operate correctly.
Tom
Thank you for reference to other forum. For what it is worth, just tested on non-GFCI outlet. Small spark (doesn't exit motor frame) when centrifugal switch opened but very obviously switched to run winding and ran unloaded for over a minute with no issues. I appreciate the replies.
Tom
Hello. I have an old AO Smith 115 volt, 1/3 horsepower, two speed (1725/1140 rpm) motor from a belt driven fan. When trying to start, it was just humming, but would start and run fine if the fan was spun manually. I thought perhaps bad start capacitor or bad centrifugal switch. I realize I can...