I own a Clark AC2001A 2HP/4Gallon compressor (approx. 3 years old) that I use 3-4 times year. I am sure that the oil level has remained at the proper indicated level. Recently, I was going to use it, but when I turned it on, the motor just hummed without actually compressing air, as if the motor or piston was stuck. I quickly turned it off so I wouldn't burn out the motor. I know that this is not a fuse or other circuit problem because other items run fine when plugged into this circuit. Is there something simple that I should try to see if I can get it running, or is a major overhaul the only solution?

I am the person who originally posted this question. I was not able to contact ClarkeUSA (out of business?). However, I was able to find a capacitor with the same specifications at a local motor repair shop. Although it was not of the same physical size and the connectors required adaptation, I was able to fashion a bracket for the new capacitor and my compressor works again. Thanks to hsmith813; you're awesome!! I am the person who originally posted this question. I was not able to contact ClarkeUSA (out of business?). However, I was able to find a capacitor with the same specifications at a local motor repair shop. Although it was not of the same physical size and the connectors required adaptation, I was able to fashion a bracket for the new capacitor and my compressor works again. Thanks to hsmith813; you're awesome!!