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Home >> Mercury >> 1981 >> Capri Base, 4.2L Eng VIN D, Trans Mfr CD C3 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> MOTORCRAFT Model 2150 2-Barrel >> Adjustment >> Choke Unloader

Choke Unloader

  1. Hold throttle wide open. Measure specified choke unloader clearance between lower edge of choke valve and air horn wall. See Fig 1.
    Fig 1: Adjusting Choke Unloader
    G09317612Courtesy of FORD MOTOR CO.
  2. 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.
  3. After adjustment is correct, 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.
  4. Operate throttle and make sure that tang does not stick or bind against any portion of the linkage or carburetor casting.
    Fig 2: Unloader-to-Fast Idle Cam Clearance
    G09317613Courtesy of FORD MOTOR CO.
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