Disassembly (Air Horn & Choke Assembly)
- DO NOT remove choke valve and shaft from air horn. Disconnect vacuum hose from choke opener (pull-off) diaphragm. Remove accelerator pump connecting rod, spring and lever. see scheme 22 Remove spring. Disconnect air vent solenoid valve wire from connector.
- Disconnect choke rod. Remove air horn retaining bolts. Remove air horn and choke assembly from main body. Remove air vent solenoid valve, spring and gasket from air horn.
Disassembly (Needle Valve & Float)
Remove float, pin and gasket. see scheme 15and see scheme 22. Remove needle valve assembly. Remove sight glass assembly from main body.
| CAUTION | Note location and size of air bleeds and jets before removal. Ensure components are installed in correct locations. |
Disassembly (Air Bleeds & Jets)
- Remove secondary slow jet, secondary slow bleed, secondary main bleed and secondary main jet from main body. (Scheme 9)and see scheme 22. Remove primary main bleed, slow jet and plug, primary slow bleed and primary main jet from main body.
- Remove richer air bleed, primary slow bleed, coasting richer air bleed and coasting richer jet from air horn. (Scheme 10)and see scheme 22.
Scheme 9
Scheme 10
Disassembly (Main Body)
- DO NOT remove venturi's from main body. Remove coasting richer solenoid valve and "O" ring. see scheme 22 Remove idle switch and spring. Remove slow fuel-cut solenoid valve, needle valve, spring and gasket. Remove dashpot (M/T).
- Remove accelerator pump plunger and spring assembly. Remove retaining clip, strainer and inlet check ball. Remove outlet check ball plug, outlet check ball and spring.
- Disconnect throttle link, vacuum diaphragm connecting rod and throttle return spring. Remove throttle body-to-main body retaining bolts (one bolt is located inside throttle body). Separate throttle body from main body.
Disassembly (Throttle Body)
DO NOT remove throttle valve and shaft from throttle body. Remove vacuum (secondary) diaphragm assembly. Remove diaphragm cover screws. Remove cover, spring and diaphragm. Using small punch and hammer, remove spring pin located in front of mixture adjusting screw. Remove mixture adjusting screw.
Note. DO NOT immerse diaphragms, electrical components or synthetic parts in carburetor cleaner.
Reassembly (All Parts)
- To reassemble, reverse disassembly procedure using NEW gaskets. DO NOT install spring pin in front of mixture screw until idle mixture has been adjusted with engine running. Before installing air horn on main body, adjust float level and float drop. Install NEW "O" ring on M/C solenoid and coat "O" ring with gasoline.
- After reassembly and before installing carburetor, adjust choke pull-off diaphragm, fast idle cam (throttle opening angle), fast idle cam (choke opening angle), choke unloader, secondary throttle valve and accelerator cable.
- After installing carburetor, adjust curb (hot) idle speed, fast (cold) idle speed and idle mixture. See «ADJUSTMENTS»(ref-18257) article.