Hello I think the voltage answer is INCORRECT for this 4hp system - where for this dual motor 20 gal compressor it says "input voltage 220v 60 hz" on one of the product pictures. Can you clarify if these motors are 120 or 220v.
Also -- I notice that the individual replacement motors listed on your website for purchase (OLF1500) appear to be 120v motors. Do you have replacement motors for this 20 gal / 75L 4HP system?