Disassembly

1. Place carburetor on repair stand C-3886 or equivalent.
2. Remove air cleaner bolt and retainer assembly.
3. Remove cotter pin from accelerator pump arm link and remove link.
4. Remove bowl vent assembly from air horn.
5. Remove choke vacuum diaphragm hose from main body.
6. Remove choke diaphragm, linkage and bracket assembly.
7. Remove fast idle cam lever to choke shaft attaching nut and washer.
8. Disengage fast idle connector link from lever and fast idle cam.
9. Disconnect and remove accelerator operating link.
10. Remove six air horn attaching screws, lift air horn straight up and away from main body and discard gasket.
11. Remove accelerator pump operating shaft attaching E-clip and pull shaft straight out.
12. Remove accelerator pump arm and internal pump lever.
13. Holding accelerator pump shaft at flat area with suitable wrench, remove cap nut.
14. Gently pry up retaining ring tangs and remove vacuum power valve piston.
15. Remove mechanical power valve pushrod and spring assembly by gently prying off plastic cap and removing E-clip.
16. Remove fuel inlet fitting from main body, discarding gasket.
17. Remove oxygen feedback solenoid.
18. Remove float hinge pin, float baffle and float assembly.
19. Using screwdriver, remove main metering jets.
20. Using tool C-4231 or equivalent, remove vacuum and mechanical power valves, ensuring blade is squarely seated in slot on top of valve to avoid damaging power valve needle. Do not interchange mechanical and power valve assemblies. The mechanical power valve needle is approximately .05 inch shorter on 1985-86 models or .100 inch shorter on 1987-88 models than the vacuum power valve needle. The vacuum power valve needle can be identified by an undercut groove located just above the needle stop. The valve seats can be identified by a number stamped on the valve and they must be kept with their respective needle and spring assembly. The mechanical power valve is located on the choke side of the carburetor and the vacuum power valve is located on the throttle side.
21. Remove venturi cluster screws, lift venturi cluster and gasket up and away from main body and discard gasket.
22. Invert carburetor, catching weight and check ball.
23. Remove 4 throttle body attaching screws, separate bodies and gasket and discard gasket.
24. Remove fast idle cam E-clip and slide fast idle cam off stub shaft.
25. Remove concealment plugs, then the idle mixture screws and springs from throttle body.