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.
- Clean outside of carburetor of dirt and other debris.
- Remove float bowl; watch out for the bowl gasket.
- Remove the float pin, float, inlet needle, and inlet seat.
- Remove the three jets from the float chamber of the carburetor body.
- Remove the slide; use caution when removing the slide so as not to bend the jet needle and scratch the slide
- Remove the electric choke.
- 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.
- Start by installing of the jets into the float area of the carburetor. Verify that the jets are being installed in the correct position.
- Install the inlet-needle seat; lubricate the o-ring to ensure that it is not damaged during install.
- Place the inlet-needle onto the float then install float. Make sure to push the fulcrum pin in all of the way.
- 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.
- Install bowl gasket and bowl.
- Install throttle slide, spring, and cover. Make sure that the slide moves up and down freely
- 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.
- Install pilot air screw; turn it in until seated, then back out 1-1/2 times.
- Install electric choke.