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CARBURETOR-HOLLEY
14-9
POWER JET
VALVE LEVER
FLOAT PIVOT
/
"I
/
ECONOMIZER
BODY
64x297
Fig. 9-Economizer
Body Assembly
(13) Remove the fast idle cam retaining screw,
then remove cam, and at the same time, disengage
the fast idle cam rod.
(14) Remove the idle air mixture adjusting screw
and spring from the throttle flange.
(15) Remove the fast idle and curb idle speed
screws and springs from the throttle lever.
(16) Remove the screws that hold the choke valve
to the choke shaft.
These screws are staked to prevent
loosening, and extreme care is necessary, to avoid
breaking off in the choke shaft.
(17)
Lift out the choke valve. Withdraw the choke
shaft and lever out of the carburetor.
The carburetor assembly now has been disassem-
bled as far as necessary for cleaning and inspection.
It is usually not advisable to remove the throttle shaft
and valve from the throttle flange, unless wear or
damage necessitates the installation of new parts.
INSPECTION AND ASSEMBLY
Throttle Body
(1) Check the throttle shaft for excessive wear in
the throttle body. If wear is extreme, it is recom-
mended that the carburetor assembly be replaced
rather than installing a new shaft in old body.
During manufacture, the location of the idle trans-
fer port and the spark advance control ports to the
throttle valve is carefully established for one particu-
lar assembly.
If a new shaft should be installed in an old, worn
throttle body, it would be very unlikely that the origi-
nal relationship of the ports to the valve would be
obtained. Changing the relationship of the valve to
the ports would adversely affect normal car opera-
tion between the speeds of
15
and 30 miles per hour.
However, if it has been determined that a new shaft
or valve is to be installed, adhere to the following in-
structions:
(2)
Mark the position of the throttle valve in the
bore.
(3) Remove the screws that hold the throttle valve
to the shaft, then slide the valve out of the bore.
CAUTION:
These screws are staked on the opposite
side and care should be used at removal so as not to
break in the shaft.
(4) Slide the throttle shaft out of the throttle body.
(5) Install new throttle shaft and lever (or new
valve).
(6) Install NEW screws but do not tighten. Hold
the valve in place, with the fingers pressing on the
high side of valve. Tap the valve lightly with a screw-
driver to seat in the throttle bore. Now, tighten the
screws securely and stake by squeezing with pliers.
(7) Install the idle mixture screw and spring in the
throttle body. (The tapered portion must be straight
and smooth. If the tapered portion is grooved or
ridged, a new idle mixture screw should be installed
to insure having correct idle mixture control.)
Do not
use a screwdriver.
Turn the screw
lightly
against its
seat with the fingers. Back off
1
full turn for approxi-
mate adjustment.
Assembling the Carburetor
(1)
Slide the choke shaft into the air horn, then in-
stall the choke valve.
(2)
Install the choke valve attaching screws but do
not tighten. Hold the valve closed, with the fingers
pressing on the high side of the valve. Tap the valve
lightly with a screwdriver to seat in the air horn.
Tighten the attaching screws securely and stake by
squeezing with pliers.
(3) Test the choke valve for binding by rotating the
lever through the extent of its full travel.
(4) Install the fast idle and curb idle speed screws
and springs in the throttle lever.
(5) Engage the pump cam link with the lever and
throttle lever, then install cam and secure with clip.
When installing the link, be sure link is in the center
hole of throttle lever.
(6) Refer to (Fig. 8), then slide the pump spring
over the pump diaphragm stem. Install the assembly
in position in the fuel bowl and at the same time, en-
gage the hook on the diaphragm stem with the recess
in the pump lever.
(7) Install the main jet in the economizer body,
using Tool C-3748. Refer to (Fig. 9).
(8) Turn the carburetor with bowl opening up then
position the main well and equalizer body in the car-
buretor, as shown in (Fig.
7).
Install screws and tight-
en securely.
(9)
Engage the choke link with the choke lever and
fast idle cam. Place cam in position, then install re-
taining screw. Tighten screw securely.
(10) Slide the float into position over the fulcrum
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