Disassembly

1. To facilitate working on carburetor and to prevent damaging throttle plates, install four bolts approximately 2.25 inches long of proper diameter and eight nuts on carburetor base. On vehicles equipped with automatic transmission, the transmission kickdown lever or throttle valve lever must be adjusted whenever the carburetor assembly is removed for service or replacement.
2. Remove air cleaner anchor screw, then the automatic choke control rod retainer.
3. Remove air horn attaching screws, lockwashers and carburetor identification tag, then the air horn and air horn gasket.
4. On models with automatic choke, remove choke control rod by loosening screw that secures choke shaft lever to choke shaft.
5. On all models, remove rod from air horn, then the plastic dust shield from the choke rod.
6. Before removing choke plate, remove staking marks on choke plate attaching screws and remove screws.
7. Remove choke plate by sliding it out of shaft from top of air horn, then remove any burrs around screw holes. Steps 6 and 7 are not applicable to 1983 - 85 models that have an aneroid which does not require a bypass choke plate.
8. On 1983 models equipped with altitude compensation, rotate main choke shaft and disconnect connecting link, then slide choke shaft out of air horn. On 1983 models equipped with altitude compensation, the bypass choke plate is removed the same as the main choke plate. To remove choke plate shafts, remove link retainer and link, then slide shafts out of air horn body.
9. On all models, remove fast idle cam retainer.
10. To remove choke cap, proceed as follows:
a. center punch thermostatic choke cap breakaway retaining screws.
b. Using 1/4 inch drill bit, drill recess in each screw head deep enough to remove retainer from cap.
c. Using suitable scraper, remove gasket material from cap and housing.
11. On all models, remove choke housing assembly retaining screws.
12. If air horn was not previously removed, remove choke control rod retainer.
13. Remove choke housing assembly, gasket and the fast idle cam and rod from the fast idle cam hub.
14. Remove choke lever retaining screw and washer, then disconnect choke control rod from choke lever and remove choke lever and fast idle cam lever from choke housing.
15. Using screwdriver, pry float shaft retainer from fuel inlet seal, then remove float, float shaft retainer and fuel inlet needle assembly.
16. Remove retainer, then the float shaft and float damper spring, if equipped, from the float lever.
17. Remove fuel inlet needle, seat, filter screen and main jets.
18. Remove booster venturi screw, booster venturi and metering rod assembly and gasket. Feedback carburetors require removal of two booster retaining screws.
19. Remove filter screen from booster venturi screw.
20. Invert main body and let accelerator pump discharge weight and ball fall into hand.
21. To disassemble lift rod from booster, remove lift spring retaining clip and spring, then separate lift rod assembly from booster. Do not separate metering rod hanger from lift rod.
22. Remove accelerator pump link and rod assembly by using blunt tipped punch to remove roll pin from accelerator pump cover.
23. Remove accelerator pump cover attaching screws, then the vent valve actuating lever, if equipped. The two retaining screws for the left side are longer when a mechanical vent valve is used.
24. Remove accelerator pump cover, diaphragm assembly and spring.
25. Remove TCP valve and gasket, if equipped.
26. To remove Elastomer valve, grasp firmly and pull it out. If Elastomer valve tip breaks off during removal, ensure to remove tip from fuel bowl. An Elastomer valve must be replaced whenever it is removed from carburetor. On some 1983 - 86 models, a small cavity Elastomer valve can be used in place of a large cavity Elastomer valve, but a large cavity Elastomer valve cannot be used to replace a small cavity Elastomer valve.
27. Invert main body and remove enrichment valve cover and gasket, then the enrichment valve and gasket, discarding enrichment valve gasket.
28. To remove idle fuel mixture adjusting screws and springs, support area under limiter plug and, using suitable pointed tool directed at tang, lightly tap plug forward.
29. Remove nut and washer securing fast idle adjusting lever assembly to throttle shaft, then remove lever assembly.
30. Remove idle screw and retainer from fast idle adjusting lever.
31. Remove throttle positioner, if equipped.
32. Lightly scribe throttle plates along throttle shaft and mark each plate and its corresponding bore for proper installation.
33. File off staked portion of throttle plate attaching screws, then remove screws.
34. Remove any burrs caused by screw removal, then withdraw throttle shaft, catching mechanical high speed bleed actuator located on throttle shaft between throttle plates. On feedback carburetors, remove two throttle position sensor mounting screws and the sensor before removing throttle shaft.
35. On carburetors equipped with altitude compensation, remove four attaching screws, aneroid and valve assembly and the gasket, then remove three aneroid to valve screws and separate aneroid, valve and gasket. New style aneroid requires removal of three mounting screws, aneroid assembly and gasket. This style aneroid should not be disassembled.
36. On feedback carburetors, remove three duty cycle solenoid mounting screws, duty cycle solenoid and the gasket from main body.