There should only be four clicks (5 positions) on a rotary switch. (Five clicks and 6 positions for a high idle switch)
You will need to remove the knob, the washer, and the washer with a tooth on it. You will then turn the switch all the way counterclockwise and place the tooth of the second washer in position 5. Replace the washer, the nut and the knob and test if it has the 5 positions(4-clicks).