Two position is for engines with a separate starter pushbutton. Three position: Off/Ignition/Start. Four position: Accessory/ Off/Ignition/Start or Off/Run/Push to Choke/Battery-Start (magneto switch).
thing fell apart in my hand. either defective plastic molding or someone broke this thing previously, glued it back together, and returned it so that it was put back on them shelf for someone like me to buy. Either way. I cannot recommend this product to anyone... not even folks i dislike.