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6C-48
1977 PONTIAC SERVICE MANUAL
Fig. 6C-87 Choke Housing Installation
coil assembly until inside coil lever is adjusted. See
Adjustments.
7. Holding down on fast idle cam (hot idle position),
install end of vacuum break rod in hole in intermediate choke
lever.
8. Install end of vacuum break rod in slot in rear vacuum
break plunger. Then install rear vacuum break and bracket
assembly to float bowl using two attaching screws (Fig. 6C-
83). Tighten securely.
NOTE: D o not attach vacuum break hose until after the
vacuum
break
adjustment
is
completed.
See
Adjustments.
9. Install pump discharge check ball and retainer in
passage next to pump well. Tighten retainer securely.
10. Install primary metering jets.
11. Install new needle seat assembly, with gasket, using
Tool 5-22769.
12. T o make adjustment easier, bend float arm upward
at notch in arm before assembly. Install float by sliding float
lever under pull clip from front to back. With float lever in
pull clip, hold float assembly at toe and install retaining pin
toward pump well side.
CAUTI
0 N: Do not install float needle pull clip
into holes in float (Fig. 6C-88).
Float Level Adjustment (Fig. 6C-66)
1. Hold float retainer firmly in place.
2. Push float down lightly against needle.
3. With adjustable T-scale, gage from top of float bowl
casting (air horn gasket removed) to top of float at toe-gaging
point 3/16" back from toe.
4. Bend float arm as necessary for proper adjustment by
pushing on pontoon.
FLOAT NEEDLE PULL CLlP LOCATION
HOOK CLlP OVER EDGE OF FLAT
O N FLOAT A R M FACING FLOAT PONTOON
THESE HOLES
Fig. 6C-88 Float Needle Pull Clip Location
5. Visually check float alignment after adjustment.
6. Install plastic filler block over float needle, pressing
downward until properly seated.
7. Install power piston spring in power piston well.
If metering rods were removed from hanger, reinstall
making sure tension spring is connected to top of each rod
(Fig. 6C-71). Install power piston assembly in well with
metering rods properly positioned in metering jets. Press
down firmly on plastic power piston retainer to make sure
that the retainer is seated in recess in bowl and the top is flush
with the top of the bowl casting. If necessary, using a drift
punch and small hammer, tap retainer lightly in place.
8. Install aneroid cavity insert into float bowl.
9. Install pump return spring in pump well.
10. Install air horn gasket by carefully sliding tab of
gasket beneath the power piston hanger. Position gasket over
the two dowel pins on the float bowl.
Carefully lift one corner of the air horn gasket and install
pump plunger in the pump well by pushing the plunger to
the bottom of the well against return spring tension. While
holding in this position, align pump plunger stem with hole
in gasket.
Air Horn
1. If removed, install choke shaft, choke valve and two
attaching screws. Tighten screws securely and stake lightly
in place.
NOTE: Check choke valve for freedom of movement
and proper alignment before staking screws in place.
2. Holding down on air horn gasket at pump plunger
location, carefully lower air horn assembly onto float bowl
making sure that the bleed tubes, and pump plunger stem are
positioned properly through the holes in the air horn gasket.
C A UTI
0 N
:
Do not force the air horn assembly
onto the bowl but rather lightly lower in place.
3. Install two long air horn screws, four short screws,
and two countersunk screws into primary venturi area. Install
longer (front) air horn screw.
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