solution to loosen the accumulated foreign matter.
Laquer thinner or denatured alcohol may be used if a
commercial carburetor cleaning solvent is not
available. Place the parts to be cleaned in a wire
basket suspended in the solution. After the parts have
soaked sufficiently to loosen the foreign deposits,
they should be rinsed in hot water to remove all traces
of the cleaning solution. All remaining foreign
deposits should be scrubbed away with a stiff bristle
brush while the parts are being rinsed.
(2)
Soak each casting and part briefly in clean
gasoline and dry them with compressed air. Direct the
compressed air through all passages in the castings
and through all openings, jets, and tubes. As the
neoprene diaphragm of the dashpot assembly is
deteriorated by most cleaning solvents, the exterior of
the dashpot assembly should be wiped clean with a
rag moistened with gasoline. Do not use compressed
air on this assembly as the diaphragm and the
synthetic rubber bellows seal may be distorted or
ruptured.
CAUTION
tion may be made by directing compressed air
through the passages. (Refer to the "Operation"
section, beginning on page 2, for locations of pass-
ages in the castings).
(2) CHOKE SHAFT AND THROTTLE SHAFT
Check the shafts for distortion, stripped
threads, or loose levers. If irregularities are found, the
shaft should be discarded. Also examine the swivel
assembly on the choke lever for stripped threads. If
damage is found or the swivel is no longer securely
riveted, the choke shaft and lever assembly must be
replaced.
(3) FUEL BOWL
The fuel bowl must be replaced if the edges
are chipped or if cracks are found anywhere in the
bowl. In the plastic fuel bowls containing the
adjustable jet, the adjusting needle body must be
checked for signs of leaking or for other evidence of
damage or distortion.
(4) FLOAT AND LEVER ASSEMBLY
Attempts to clean passages with a wire, drill,
or similar object may distort those passages
and adversely affect carburetor performance.
Use of a buffing wheel, wire brush, or other
abrasive means to remove surface deposits
may damage the part and also remove the
protective plating, exposing the part to
corrosion.
NOTE
As gaskets, neoprene diaphragms, and felt
seals are deteriorated by most solvents, those
items should never be exposed to cleaning
fluids. Never re-use old gaskets neoprene
diaphragms, or felt seals when rebuilding the
carburetor.
Replace the float and lever assembly if the
float leaks, or if the assembly is corroded or
damaged. Shake the float to determine if fuel has
leaked into it.
(5) THROTTLE AND CHOKE PLATES
Discard the plates if distortion, nicked
edges, corrosion, or damage to the protective plating
is found. Check to insure that the poppet valve in the
choke plate is clean and operates properly.
(6) SPRINGS AND RETAINERS
Distorted or damaged springs and retainers
must be replaced.
B. INSPECTION
(1) MAJOR CASTINGS
All major castings are to be examined for
cracks, stripped threads, or damaged gasket mating
surfaces and discarded if damage is found. Check the
venturi bore in the main body casting for signs of
nicks, scratches, or other imperfections. Calibration
of the carburetor may be affected by even a slight
irregularity in the venturi. Examine the main
discharge nozzle in the venturi and other passages in
the castings for signs of damage or obstruction. The
check for obstruc
(7) SCREWS, LOCKWASHERS, AND
Screws, lockwashers, and nuts must be
replaced if stripped threads, distortion or other
damage is found.
6. REASSEMBLY
A. REASSEMBLY-THROTTLE BODY
(1) Slide the throttle shaft and lever assembly
into position in the throttle body. Referring the marks
scribed on the plate during disassembly, set the plate
in place on the throttle shaft. and hold the throttle
body up to the light. If no excessive amount of light
shows between the edge
