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Home › Plymouth › 1981 › Arrow Pickup Base, Automatic Trans › Repair and Diagnosis › Engine Performance › Fuel Delivery › HOLLEY Model 2280 2-Barrel › Overhaul › Disassembly

HOLLEY Model 2280 2-Barrel: Overhaul: Disassembly

  1. Position carburetor on a suitable holding fixture. Remove air cleaner bolt and retainer. Remove accelerator pump link arm.
  2. Remove bowl vent cover plate and bowl vent solenoid assembly. Remove choke vacuum diaphragm, linkage, and bracket. Remove electronic throttle control.
  3. Remove nut and washer securing fast idle cam lever to choke valve shaft. Disconnect fast idle cam rod from lever and fast idle cam.
  4. Remove 6 air horn screws. Lift air horn straight up from main body. Remove air horn gasket. Remove bowl vent valve seal. Disconnect spring and lift valve lever, spring and pin out of air horn.
  5. Remove link connecting accelerator pump plunger to operating lever. Remove accelerator pump plunger.
  6. Gently pry up vacuum piston retaining ring tangs. Remove vacuum power valve piston. Remove clip securing accelerator pump operating shaft and remove shaft. Remove pump arm and internal pump lever.
  7. Gently pry off mechanical power valve push rod plastic cap and remove clip. Remove mechanical power valve push rod and spring assembly.
  8. Remove fuel inlet fitting and gasket. Remove float hinge pin retainer, hinge pin, float baffle and float assembly. Remove main metering jets.
  9. Using special tool (C-4231) remove vacuum power valve and mechanical power valve. Make sure blade of tool is squarely seated in slots of valves to avoid damage.
    NOTE: Do not get 2 power valve assemblies mixed up. Mechanical power valve needle is about 0.050" longer than vacuum power valve needle. Mechanical power valve is located on choke side of carburetor. Do not mix up valve seats. Assemblies must be reinstalled in original locations.
  10. Remove venturi cluster screws. Lift cluster and gasket away from main body. Do not remove idle well tubes. Turn main body upside down and catch accelerator pump weight and check ball.
  11. Remove 4 throttle body screws. Separate throttle body from main body and discard gasket.
  12. Remove clip securing fast idle cam and slide cam off stub shaft. Carefully remove idle limiter caps from idle mixture screws. Remove mixture screws and springs from throttle body.
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