Carburetor Overhaul
Carburetor problems not corrected by mixture adjust-
ments may be caused by dirt in fuel passages or worn
internal parts. Under normal conditions, the carbure-
tor should seldom require cleaning since
LP
gas va-
porizes complete before reaching thecarburetor and
leaves no residue. However, a bad fuel supply or
inoperativefuel filter may allow dirt or oil tocollect in
the carburetor. This may require that the carburetor
be cleaned to restore satisfactory operation.
Overhauling the carburetor includes complete disas-
sembly, thorough cleaning, and replacement of worn
parts. Carburetor repair kits are available that supply
new gaskets and replacement parts for the compo-
nents subject to wear.
Note the position
of
all components while removing
to insure correct placement when reassembling.
Refer to Figure
6-26
for component designations.
Removal and Disassembly:
Remove the carburetor
from the intake manifold as specified in Carburetor
Air Filter, and Intake Manifold Assembly in this sec-
tion. Use the following procedure to disassemble the
carburetor.
.
Mosf
parts cleaning solvents are
k@!@!!l
flammable and can cause severe
personal injury
if
used improperly. Follow the manu-
facturers recomrnenda fions when cleaning parts.
THROTTLE
STOP
SCREW
IDLE
ADJUSTMENT
\
SCREW
ADJUSTMENT
THROTTLE
THROTTLE
Q
FIGURE
6-26.
CARBURETOR OVERHAUL
1.
2.
3.
4.
Remove the throttle stop collar and throttle stop
lever from the end
of
the throttle shaft.
Remove the throttle plate retaining screws and
throttle plate. Remove dust seals from throttle
shaft and carefully pull out throttle shaft.
Remove main and idle mixture screw assembly.
Separate lower section (bowl) of carburetor from
the upper section (bowl cover).
Clean and Repair:
When the carburetor is completely
disassembled, clean and repair using the following
procedures.
1.
Soak all metal components not replaced by repair
kit in carburetor cleaner.
Do
not soak any non-
metal parts or they may bedamaged by the clean-
ing solution. Follow the cleaner manufacturer’s
recommendations.
2.
Clean all carbon from throttle bore, especially
where the throttle plate seats. Be careful not to
plug the idle or main fuel parts.
3.
Blow out all passages with low pressure
(35
psi/
241
kPa) compressed air.
Do
not use wire
or
other objects for cleaning that might increase the
size of critical passages.
4.
Check the condition of the mixture screws (see
Figure
6-27)
and replace if worn or damaged.
5.
Replace all
old
components, seals,
and
gaskets
with new parts included in the kit.
Reassembly and Installation:
When the carburetor
parts are clean and dry, reassemble using the follow-
ing procedure.
1.
Slide in throttle shaft and install throttle plate
using new screws (if furnished in repair kit).
Before tightening the screws, the plate must be
centered in the throttle bore.
To
do
so,
move the
throttle lever to the completely closed position.
Seat the plate by gently tapping
on
it
with a small
screwdriver and then tighten the screws. Install
seal, throttle stop lever, and collar on the throttle
shaft end.
OCCUR
HERE
FS-1483
FS-1602
FIGURE
6-27.
MIXTURE NEEDLE INSPECTION
-
LP GAS
6-22
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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