Choke Unloader

Hold throttle fully open, and apply pressure on choke valve toward closed position. Measure specified choke unloader clearance between lower edge of choke valve and air horn wall.

Fig 1: Unloader Tang-to-Fast Idle Cam Clearance
Courtesy of FORD MOTOR CO.
To adjust, bend choke unloader tang that contacts fast idle cam. Bend tang toward cam to increase clearance and away from cam to decrease clearance. See Fig 1.
After correct adjustment is obtained, open throttle until unloader tang is directly under fast idle cam pivot. Make sure there is 0.070" clearance between unloader tang and fast idle cam. See Fig 2.

Fig 2: Unloader Tang-to-Fast Idle Cam Clearance
Courtesy of FORD MOTOR CO.
Operate throttle and make sure that tang does not stick or bind against any portion of the linkage or carburetor casting.