id lay money on it it would be capacitor start single phase the conection box isnt big enough to acomodate them .but would the price warant it. then shelling out on a new motor and buying it in the 1st place for a pittly 4.1cfmIt could be a 3 phase, but it's still no bigger than 2.2 Kw, so about 3hp. They can be swapped to a single phase motor, easy peasy.




