My giant air compressor is acting like it can't pull the load. I checked to make sure it spins freely and now suspect the starter capacitors need to be replaced. It is a 2.5 hp motor and has two capacitors. Oddly, they are not the same size. One is like 216-257 mfd 270vac and the other is a 50 mfd 400vac. It may have been replaced with the wrong capacitor by the previous owner. Is it normal to have two different sizes on one motor?