FUEL SYSTEM 4-11
CLEANING
• Clean all jets with a spray-type carburetor cleaner and dry
them with compressed air.
• Clean all circuits of the carburetor thoroughly - not just the
perceived problem area. Clean the circuits in the carburetor
body with a spray-type cleaner and allow each circuit to soak,
if necessary, to loosen dirt and varnish. Blow the body with
compressed air.
INSPECTION AND ADJUSTMENT
• Check the following items for any damage or clogging.
* Pilot jet * Starter passageway
* Main jet * Needle jet
* Starter plunger * Throttle stop screw
* Float * Needle valve seat
* Piston valve * Jet needle
* Pilot passageway
• If any abnormal condition is found, clean the part. If damage
or clogging is found, replace the part with a new one.
NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and the nee-
dle valve, the gasoline will continue flowing and overflow. If the
needle valve is worn beyond the permissible limit, similar trouble
will occur. Conversely, if the needle valve sticks, the gasoline
will not flow into the float chamber. Clean the float chamber and
float parts with gasoline.
Some carburetor cleaning chemicals, especially
dip-type soaking solutions, are very corrosive and
must be handled carefully. Always follow the chemical
manufacturer’s instructions on proper use, handling
and storage.
Do not use a wire to clean the jets or passageways. A
wire can damage the jets and passageways. If the
components cannot be cleaned with a spray-type
cleaner, it may be necessary to use a dip-type clean-
ing solution and allow them to soak. Always follow the
chemical manufacturer’s instructions for proper use
and cleaning of the carburetor components.
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