4-5
4
KC0029A
10. Unscrew and remove the idle adjust screw.
Account for the spring and washer.
CLEANING AND INSPECTING
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Place all metallic components in a wire basket and
submerge in carburetor cleaner.
2. Soak for 30 minutes; then rinse with clean, hot
water.
3. Wash all non-metallic components with soap and
water. Rinse thoroughly.
4. Dry all components with compressed air only
making sure all holes, orifices, and channels are
unobstructed.
5. Inspect the carburetor body for cracks, nicks,
stripped threads, and any imperfections in the cast-
ing.
6. Inspect the vacuum piston/diaphragm for cracks,
imperfections in the casting, or cracks and tears in
the rubber.
7. Inspect float for damage.
8. Inspect gasket and O-rings for distortion, tears, or
noticeable damage.
9. Inspect tips of the jet needle, pilot screw, and the
needle jet for wear, damage, or distortion.
10. Inspect the slow jet and main jet for obstructions
or damage.
NOTE: If the slow jet is obstructed, the mixture
will be extremely lean at idle and part-throttle oper-
ation.
11. Inspect the float valve for wear or damage.
12. Inspect the carburetor mounting flange for damage
and tightness.
ASSEMBLING
1. Thread the idle adjust screw into the carburetor
making sure the washer and spring are properly
positioned.
2. Install the pilot screw, spring, washer, and O-ring.
KC0029A
KC0028A
NOTE: Turn the pilot screw clockwise until it is
lightly seated; then turn it counterclockwise the rec-
ommended number of turns as an initial setting.
NOTE: Note the locations of the jets and holder
during assembling procedures.
! WARNING
When drying components with compressed air,
always wear safety glasses.
! CAUTION
DO NOT place any non-metallic components in
parts-cleaning solvent because damage or deterio-
ration will result.
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