Choke Linkage

Fig. 9 Choke linkage adjustment, first stage.:

1. Remove air cleaner and choke coil
2. Disconnect upper choke opener hose from thermo valve and leave open to atmosphere, and disconnect lower hose and connect suitable vacuum pump to thermo valve.
3. Apply at least 8 inches Hg vacuum to thermovalve. If vacuum drops below 8 inches Hg, vacuum pressure has opened bleed valve. Slowly reapply vacuum until highest vacuum reading can be maintained; this will bring opener rod as close as possible to bleed valve without opening valve.
4. Rotate choke drive lever counterclockwise until it contacts choke opener lever, then measure choke valve clearance, Fig. 9.
5. If 1st stage clearance is not .119-.125 inch for manual transmission models or .091-.097 inch for automatic transmission models, adjust by bending tab A, Fig. 9.

Fig. 10 Choke linkage adjustment, second stage.:

6. Plug upper port on thermo valve, pull choke opener rod to the fully extended position by applying 6-7 inches Hg vacuum to lower port, Fig. 10, rotate choke drive lever counterclockwise until it seats against choke opener lever, then measure choke valve clearance.
7. If 2nd stage clearance is not .200-.208 inch, adjust by bending tab B, Fig. 10.

Fig. 11 Choke linkage adjustment, third stage.:

8. Continue holding opener lever against tab, rotate choke drive lever until tab C contacts spring, then measure choke clearance, Fig. 11.
9. If 3rd stage clearance is not .394-.412 inch, adjust by bending tab C, Fig. 11.
10. Reinstall choke cover and adjust as outlined.