Carburetor Cleaning And Inspection - Jeep 1987 Wrangler Workshop Manual

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FUEL SYSTEM - BBD CARBURETOR
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Remove the screws attaching the throttle body
to the main body and separate the bodies.
Discard the gasket.
NOTE: If it is necessary to remove the idle
mixture adjustment screws because of inability
to clean the passages with air pressure or by
soaking, remove the dowel pins with a drill and
punch.
Count the number of turns required to lightly
seat each mixture screw and record this for use
during assembly. Remove the screws and
springs from the throttle body.
Carburetor Cleaning and Inspection
Dirt, gum, water and carbon contamination in
the carburetor or on exterior moving parts is
often responsible for unsatisfactory engine
performance. Efficient carburetion depends
upon careful cleaning and inspection.
The cleaning and inspection procedures listed
below do not involve those parts included in the
carburetor overhaul/repair kit.
Install all gaskets and parts included in the repair
kit when the carburetor is assembled. Discard
the original gaskets and parts.
CAUTION: Do not use a wire brush to clean any
component. Do not use a drill bit or wire to clean
out openings or passages. This may enlarge the
passages and change the calibration of the
carburetor.
Wash all the components (except the vacuum
break diaphragm, solenoid, bowl vent seal and
stepper motor) in clean, commercial carburetor
cleaning solvent.
If a commercial solvent is not available, use
mineral spirits, lacquer thinner or denatured
alcohol.
If a commercial solvent is used, rinse the
components in hot water to remove all traces of
the cleaning solvent, then blow dry with
compressed air.
Wipe the components that cannot be immersed
in solvent with a clean, soft, dry cloth. Ensure
that all dirt, gum, carbon and other foreign
matter are removed from the components.
Force compressed air through all carburetor
passages.
Inspect the choke shaft for excessive looseness
or binding.
Inspect the choke valve for nicked edges and for
ease of operation.
Inspect the throttle shaft for e x c e s s i v e
looseness or binding in its bore.
Inspect throttle valve for burrs or nicks that might
prevent proper closing.
Inspect the main body, throttle body, air horn,
venturi assemblies, choke housing and choke
cover for cracks.
Replace the float if the arm needle contact
surface is grooved.
If the float is serviceable, polish the needle
contact surface of the arm with crocus cloth or
steel wool.
Replace the float shaft if worn.
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