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3-40
CARTER CARBURETOR
ENGINE FUEL AND EXHAUST SYSTEMS
(114
)
tering rods bottom in carburetor body
casting.
(c) While holding rods down and throttle
valves closed
,
revolve metering rod arm until
finger on arm contacts lip of vacumeter link,
then
carefully
tighten metering rod arm clamp
screw. See figure 3-60.
METER ROD
ARM ClAMP
SCREW
- - - : ; J
Figure 3-60-Adjusting Metering Rods
24.
Pack dust cover screw holes in bowl cover
with a light graphite grease and install dust
cover.
Install new air horn gasket and the pump
jet and housing
assembly.
See figure 3-43.
25. Adjust
Accelerating
Pump Jets. Good ac-
celeration performance at low speeds depends
primarily on the gasoline discharged from the
pump jets. Each of the two jet streams must be
directed to its proper section of the venturi sys-
tem,
and in order to obtain maximum efficiency
each stream must strike a target point marked
on the primary venturi.
(a) Fill float bowl with gasoline through
float k">owl inlet.
(b) Operate accelerating pump with a short,
quick movement of throttle shaft lever and note
whether
the stream from each jet strikes its
specified target point. See figure 3-61.
(c) Carefully bend
jets,
if necessary, to
properly aim the streams. Only a slight bend
should
be
n
ecessaru; use
care to avoid
distort-
ing the
jets.
26. Install bowl strainer
a
nd strainer nut
with a new gasket.
27.
Assemble and
install air horn
an
d clim
ac-
tic control
assembly,
following procedure given
in paragraph 3-24. Adjust fast idle cam and
choke unloader as described in paragraph
3-23,
but use the following bench method for setting
fast idle adjustment screw.
(a) With adjustment screw in contact with
highest section of fast idle cam, adjust screw
until a wire gauge just can be inserted between
edge of throttle va lve and the throttle body
diametrically opposite the idle ports.
(b) Use a wire gauge .015" in diameter for
the 663 S (series 40-50)
carburetor,
and .018"
in diameter for the 664 S (series 70) carbu-
retor.
28. Check the timing of the accelerator vac-
uum switch as described in paragraph 10-32.
Us
e
Carter Indicator
Gauge
T109
-155
S if
avail-
able; otherwise use a
6-volt
battery and test
light.
b. Installation of Carburetor
1. Make sure that carburetor gasket is in
good condition, then install carburetor on in
-
take
manifold.
2. Clean the gasoline filter
(par.
3-9), install
filter
on carburetor and connect the gasoline
pipe.
Connect the vacuum spark control pipe
and
choke
upper heat pipe.
3. Adjust and connect throttle linkage as de-
scribed in paragraph 3-10.
4.
Connect the accelerator vacuum switch
wires.
If
timing of switch was not checked on
the bench, it may be
checked
after installation
of carburetor, as described in paragraph 10-32.
5.
Install
air cleaner and silencer.
6. Check
float bowl fuel level and adjust car-
buretor as described in paragraph 3-12.
Figure 3-61-Pump Jet Targets
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