Service Manual

3-12 FUEL SYSTEM
Carburetor
Carburetor Cleaning
Clean the carburetor in a well-ventilated area, and take care
that there is no sparks or flame anywhere near the working
area; this includes any appliance with a pilot light. Because
of the danger of highly flammable liquids, do not use gasoline
or low flash-point solvents to clean the carburetors.
CAUTION
Do not use compressed air on an assembled carburetor, or the
floats may be crushed by the pressure.
Remove as many rubber or plastic parts from the carburetor
as possible before cleaning the carburetor with a cleaning
solution. This will prevent to damage or deterioration of the
parts.
The carburetor body has plastic parts that cannot be removed.
Do not use a strong carburetor cleaning solution which could
attack these parts; instead, use a mild high flash-point clean-
ing solution safe for plastic parts.
Do not use wire or any other hard instrument to clean carbu-
retor parts, especially jets, as they may be damaged.
•
Disassemble the carburetor.
•
Immerse all the carburetor metal parts in a carburetor cleaning
solution and clean them.
•
Rinse the parts in water and dry them with compressed air.
•
Do not use rags or paper to dry parts. Lint may plug the holes or
passages.
•
Blow air through the holes and fuel passages with the compressed
air. All holes must be open.
•
Assemble the carburetor.
Carburetor Inspection
Gasoline is extremely flammable and can be explosive under
certain. Turn the ignition switch OFF. Do not smoke. Make
sure the area is well ventilated and free from any source of
flame or sparks; this includes any appliance with a pilot light.
•
Inspect the carburetor body for damage. Flange sealing surfaces
should be smooth and free of burrs and nicks. Replace the gasket if
necessary.
•
Turn the throttle and choke shafts to check that the throttle and choke
butterfly valves move smoothly.
If the valves do not move smoothly, replace the carburetor body and/
or throttle shaft and choke shaft assembly.
•
Check the gasket on the carburetor body.
If the gasket is not in good condition, replace it.
•
Check the other parts of the carburetor for wear or damage. Replace
the part if necessary.
•
Clean and check the float level as follows.
CAUTION
Do not push down on the float during float level checking.