Choke Unloader

Install rubber band to vacuum break lever of intermediate choke shaft. Open throttle, allowing choke valve to close. Install Angle Gauge (J-26701-A) on choke valve. See Fig 1 .
Adjust angle gauge to specification. See E4MC CARBURETOR SPECIFICATIONS table. Hold secondary lock-out lever away from pin. See Fig 1 .
Hold throttle lever in wide open position. Note bubble on angle gauge. Adjustment is correct when angle gauge bubble is centered. Using Linkage Adjuster (J-9789-111), adjust fast idle lever to center bubble.

Fig 1: Adjusting Choke Unloader

Courtesy of GENERAL MOTORS CORP.