Fuel / Exhaust
4.27
Carburetor Cleaning
1. Thoroughly clean all passages with carburetor cleaner or electrical contact cleaner.
W ARNING
Wear eye protection when using compressed air or chemical spray cleaners. If you get cleaner in your eyes or
if you swallow cleaner, see your doctor immediately. Some carburetor cleaners are extremely caustic and ex-
tended periods of soaking can loosen the adhesive sealer on passage drill-way plugs. Do not soak rubber or
plastic components (such as diaphragms, needle seat screen, or O-Rings) in caustic cleaning solutions. Irrepara-
ble damage will occur. Do not use agitator type carburetor cleaning equipment. Rubber parts must be cleaned
with mild detergent and hot water only.
2. If the carburetor is extremely dirty or contaminated with fuel residue and varnish, soak for short periods only in
carburetor cleaner, and rinse in hot water .
3. Replace the jets if they are extremely dirty or have a buildup of fuel residue, corrosion, or fungus. Even a small
amount of foreign material will reduce the flow characteristics of a jet.
4. Verify all passages and jets are unobstructed by spraying electrical contact cleaner through the passages.
CAUTION:
Do not use wire or welding tip cleaners on the jets as the orifice size may be altered.
5. Use low pressure air to dry carburetor body and all components.
Car buretor Assem bly
NOTE: When assembling carburetors, keep in mind the following:
S Maintain cleanliness at all times, especially watching for paint chips caused by cover removal.
S Proper needle valve control arm level, set to specification.
S Do not apply pressure on top of the needle valve assembly during adjustment.
S Use Loctitet 242 to prevent corrosion of carburetor mounting bolts and diaphragm cover .
NOTE: Precautions must be taken to prevent Loctitet from interfering with any mechanisms, linkages, dia-
phragms; entering any cavities, hoses, or orifices. Loctitet can plug off passages, or gum up linkages and com-
ponents.
1. Install O--ring, anti--siphon valves, and bypass port
covers.
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