HOW DO I ADJUST IDLE FOR BRIGGS AND STRATON 4.5?

HOW DO I ADJUST IDLE FOR BRIGGS AND STRATON 4.5 PUSH MOWER? IT IS THROTTLE FREE.
TIM D, April 2005
There should be a screw which adjusts near the float. If not, check the bottom of the float for an adjustment screw.

cholbach, June 2005