Cold Enrichment Rod (CER) Adjustment Sequence

NOTE: The CER mechanism affects carburetor air/fuel mixtures throughout engine operation, cold and warm. Several adjustments are required. Although each adjustment does affect a particular phase of operation, and each "maladjustment" can lead to a particular performance symptom, the adjustment procedure must be performed completely and in the following described sequence to provide desired CER performance. If adjustment cannot be accomplished due to epoxy in the adjustment nut, a new service assembly must be installed.

1. Remove carburetor from engine.

Cold Enrichment Rod:

2. Assemble Dial Indicator Kit 4201-C or equivalent, to carburetor.

NOTE: CER adjustment specifications are listed on a tag attached to the carburetor above the choke cap Fig. 1.

3. Remvoe choke diaphragm cover and spring.
4. Remove choke cap according to appropriate instructions.
5. Compress the idle speed positioner where applicable and insert a 5/16-1/2 inch spacer between the positioner stem and the throttle lever contact paddle. Retain in this position with a rubber band. This will locate the fast idle pick-up lever away from the cam and allow the cam to rotate freely.
6. Install Stator Cap T77L-9848-A7 or equivalent as a weight to rotate bimetal lever counterclockwise (CCW) and seat the CER.

CER Run Position Adjustment:

7. Install dial indicator with tip centered on top surface of CER. Set the dial indicator to "zero". Raise weight slightly and release to check for accurate "zero".

NOTE: This adjustment will be the reference for other adjustments. Be sure dial indicator reading is accurate Fig. 2.