2) Vacuum Break (Choke Pull-Off)

Fig. 31:

1. While holding choke valve closed, open and close throttle to "set" choke.
2. Release choke valve. If valve does not stay closed, drill out the rivets on the bi-metal spring assembly and adjust. Install new rivets.
3. With choke valve closed, connect a vacuum pump to the main main vacuum diaphragm.

Fig. 32:

4. Apply vacuum until the diaphragm moves completely.
5. Using a wire gauge, measure clearance "R" (distance between choke valve and throttle bore) while lightly holding choke valve against lever "5".

CLEARANCE "R"
0.063 in (1.6 mm)

6. If necessary, adjust clearance by bending pawl at end of lever.