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6C-18
1 9 7 7 PONTIAC SERVICE M A N U A L
Fig. 6C-28 Choke Water and
her most at
Housing
GROUNDING RING
CHOKE
COIL, HEATING ELEMENT.
AND COVER ASSEMBLY
RETAINING RlNG
RETAINING SCREW
2964
Fig. 6C-29 Choke Bi-Metal Coil Removal
4. Remove screw and lockwasher and remove bushing,
spring washer, fast idle lever and washer from housing.
5. Remove three screws and remove diaphragm cover
spring and diaphragm and shaft from housing.
6. Remove diaphragm adjusting screw from cover.
Accelerator Pump (Fig. 6C-32)
Remove three screws and remove pump cover,
diaphragm and return spring from housing.
Carburetor Body (Fig. 6C-33)
1. Remove primary high speed bleed and main well tube.
Remove secondary high speed bleed and main well tube.
Write down sizes of air bleed restrictions and main well
tubes so that primary and secondary can be reinstalled in the
Fig. 6C-30 Choke Housing - Assembled View
proper channels.
2. Remove primary and secondary main metering jet,
noting their size so they may be installed properly.
3. Remove power valve assembly.
4. Remove pump discharge nozzle and pump discharge
check and weight balls.
Throttle Lever, Solenoid or Dashpot, and Hot Idle
Compensator (Fig. 6C-34)
1. Remove two screws and remove solenoid or dashpot
and bracket.
2. Straighten lock washer and remove nut, lock washer,
primary throttle lever, washer, secondary operating lever,
spring and idle stop lever.
3. Remove two screws and remove cover, hot idle
compensator and gaskets.
CLEANING AND INSPECTION
1. Thoroughly clean all carburetor castings and metal
parts in cold immersion type cleaner.
CAUTION: Any rubber parts, plastic parts
including float, diaphragms, pump plunger,
dashpot and solenoid should not be immersed in
carburetor cleaner, as they will swell, harden or
distort.
Clean the pump plunger in clean gasoline and the
diaphragm unit by wiping with a rag only.
2. Blow all passages in castings dry with compressed air.
C A UTI
0 N
:
Do not pass drills or wires through
passages as this may distort passages and seriously
affect carburetor calibration.
3. Check, repair or replace the following parts if the
following problems were encountered.
A.
Flooding
1. Inspect float needle seat for dirt, deep wear grooves,
scores and proper seating.
2. Inspect float, float arm and hinge pin for distortion,
binds and burrs. Check float for leaks and/or being loaded
(heavier than normal).
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