4-5
4
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 other imperfections in
the casting.
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 assembly into the car-
buretor making sure the washer and spring are
properly positioned.
2. Install the pilot screw with the spring, the washer,
and the O-ring in this order.
CC758
NOTE: Turn the pilot screw clockwise until it is
lightly seated; then turn it counterclockwise the
recommended number of turns as an initial set-
ting.
NOTE: Note the locations of the jets and holder
during assembling procedures.
CC761A
3. Install the slow jet. Tighten securely.
4. Install the main jet into the needle jet holder and
tighten securely; then install the needle jet and
needle jet holder assembly into the carburetor and
tighten securely.
5. Place the float assembly (with float valve) into
position and secure to the carburetor with the float
pin.
CC753
NOTE: Check float arm height by placing the car-
buretor on its side w/float contacting the needle;
then measure with a caliper the height when the
float arm is in contact with the needle valve. Float
arm height should be 17 mm (0.7 in.).
6. Place the float chamber into position making sure
the O-ring is properly positioned; then secure with
the Phillips-head screws.
CC750
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