Use the MP Rotator Adjustment Tool for faster, easier adjustments
Install the MP Rotator with the Left Edge Indicator pointing to left side of the desired watering area. With the water on and the MP Rotator in the pop-up position, rotate Arc Adjustment Ring (clockwise) to increase the arc, (counter-clockwise) to decrease the arc. Use the built in ratchet feature to fine tune edge alignment by simply overriding the left or right resistance points in either direction.
Hunter MP Rotator Adjustment Tool
Rotate the Radius adjustment Screw on top in the center (clockwise) to the decrease radius, (counter-clockwise) to increase the radius.