Carburetor Cleaning and Inspection

Carburetor Disassembly

While disassembling the carburetor, pay attention to any foreign material that you may find inside the carburetor; this can help in the diagnosis of the unit.

  1. Clean outside of carburetor of dirt and other debris.
  2. Remove float bowl; watch out for the bowl gasket.
  3. Remove the float pin, float, inlet needle, and inlet seat.
  4. Remove the three jets from the float chamber of the carburetor body.
  5. Remove the slide; use caution when removing the slide so as not to bend the jet needle and scratch the slide
  6. Remove the electric choke.
  7. Remove the pilot air and the idle adjustment screws from the side of the carburetor.

Carburetor Cleaning and Inspection

  • While cleaning the carburetor use the appropriate safety gear, eye protection, gloves and so on, also use caution as to the type of tools you use for cleaning; never use drill bit to clean jets, never remove a ball plug, by doing so you will ruin the carburetor.
  • Only use approved cleaning solvent or spray, and use soft tag wires to chase the jets and other passageways.
  • Before rebuilding a carburetor go through all of the circuits and components to check for damage, wear, or leakage. Check the needle jets for any signs of breakage or a ring grove at or near the tip.
  • If necessary soak the carburetor in a carburetor cleaning solvent, make sure to follow the solvent company’s recommendations as damage may happen to the carburetor.
  • After soaking use a soft tag wire to chase all the passage ways in the carburetor; then use a spray cleaner to spray through all of the jets and passageways.

Carburetor Reassembly

  1. Start by installing of the jets into the float area of the carburetor. Verify that the jets are being installed in the correct position.
  2. Install the inlet-needle seat; lubricate the o-ring to ensure that it is not damaged during install.
  3. Place the inlet-needle onto the float then install float. Make sure to push the fulcrum pin in all of the way.
  4. Adjust the float level; by holding the carburetor on its side, when the float lever touches the needle, the float should be parallel with the mating surface of the carburetor body.
  5. Install bowl gasket and bowl.
  6. Install throttle slide, spring, and cover. Make sure that the slide moves up and down freely
  7. Install idle screw and spring; turn the screw in until meets the throttle slide then turn it 1-1/2 times. Once unit is running adjust idle to the proper speed.
  8. Install pilot air screw; turn it in until seated, then back out 1-1/2 times.
  9. Install electric choke.

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