8-16
Cleaning and Repair Procedure:
1. Soak all metal components to be reused in car-
buretor cleaner. Do not soak rubber or plastic
parts or they will be damaged. Follow the in-
structions on the cleaner container.
WARNING
Most parts cleaning solvents
are flammable and can result in severe per-
sonal injury if used improperly. Follow the
manufacturer’s recommendations when
cleaning parts.
2. Remove the carbon from the carburetor bore,
especially where the throttle and choke plates
seat. Be certain not to plug the idle or main fuel
ports.
3. Blow out all passages with compressed air. Do
not use wire or any cleaning utensil that might
widen critical passages. Wear goggles while
performing this procedure.
4. Examine any needle valves not included in the
repair kit, and replace if damaged (Figure
8-13). Replace the float if it is damaged or con-
tains fuel.
5. Check the choke and throttle shafts for exces-
sive play in their bore. Replace them if neces-
sary.
6. Replace old components with the new parts
from the repair kit.
Carburetor Reassembly:
1. If removed during overhaul, slide in the throttle
shaft and install the throttle plate using new
screws (if needed). Center the plate in the
throttle bore before tightening the screws. To
do this, back the throttle stop screw out as nec-
essary, and close the throttle lever. Seat the
plate by gently tapping it with a small screwdriv-
er, then tighten the screws. Install the choke
shaft and plate in the same manner.
2. Screw in the main nozzle. Install the float valve
into the slot in the float and install the float with
the float pin (Figure 8-14). Make sure that the
float moves freely without binding.
3. Install the main mixture screw assembly and
the idle mixture screw assembly.
CAUTION
Forcing the mixture adjustment
screws tight will damage the needle and
seat. Turn them in until only light tension
can be felt.
4. Adjust the idle and main mixture screws as de-
scribed in this section.
DAMAGE AND
WEAR OCCUR
HERE
FS1483-4s
FIGURE 8-13. MIXTURE NEEDLE INSPECTION
FLOAT
PIN
FLOAT
FLOAT
VALVE
FIGURE 8-14. FLOAT INSTALLATION
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