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FUEL SYSTEM
6C-35
Fig.
6C-61
Pump Discharge
"T"
Retainer
ATTACHWG SCREWS
///
Fig. 6C-62
Throttle Body Attaching Screws
D. Poor Performance
-
Poor Gas Mileage
1. Check power piston and power valve for dirt, sticking,
binding, damaged parts or excessive wear.
2. Clean all fuel and vacuum passages in castings.
E. Rough Idle
1. Inspect idle needle for ridges, burrs or being bent.
2. Inspect gasket mating surfaces on castings for damage
to sealing beads, nicks and other damage.
3. Clean all idle fuel passages.
4. Check throttle lever and valves for binds, nicks and
other damage.
CARBURETOR ASSEMBLY
Throttle Body
1. Install idle stop screw and spring assembly in throttle
lever if removed.
2. Install the idle mixture screws and springs into the
throttle body until finger tight and seated. Back out screws
three turns as a preliminary idle adjustment.
3.
Install new rubber dust seal into cavity inside choke
housing. Lip on seal faces toward carburetor after the housing
is installed.
4. Install inner choke coil lever and shaft assembly into
choke housing.
5. With the choke coil lever and shaft assembly installed
into housing, install the intermediate choke lever on flats of
intermediate choke shaft and retain with screw. Tighten
secure1 y.
6. Install new choke housing to carburetor gasket.
7. Position choke housing on throttle body and retain
with two attaching screws. Tighten securely.
8. Before installing the choke cover coil assembly, the
intermediate choke rod should be adjusted so that with the
choke valve closed, the lever inside the choke housing lines
up with gage as shown in adjustment chart (intermediate
choke rod adjustment).
9. Install choke thermostatic coil and cover assembly
with new gasket (where used), and end of coil below plastic
tang on the inner choke housing lever. Refer to adjustment
chart (choke coil setting). Install three choke thermostatic
coil retainers and screws. Tighten securely.
NOTE: Ground contact for the electric choke is
provided by a metal plate located at the rear of the choke
assembly. D O NOT INSTALL A CHOKE COVER
GASKET BETWEEN T H E ELECTRIC CHOKE
ASSEMBLY A N D T H E CHOKE HOUSING.
10. Place a new gasket on the bottom of the float bowl
with holes in gasket aligned with holes in casting, then
position the throttle body on gasket and install the three
attaching screws. Tighten screws evenly and securely.
Float Bowl
1. Install mechanical power valve and gasket into bottom
of pump will (when used). Tighten securely.
NOTE: The mechanical power valve in the pump well
can be identified from the vacuum power valve used in
the float bowl as follows: The pump well power valve
is longer, has four feed holes located in the side of the
valve, plus a much stronger valve spring than the
vacuum operated power valve.
CAUTION: THE TWO POWER VALVES
SHOULD
NOT
BE
MIXED
DURING
ASSEMBL Y AS SERIOUS PERFORMANCE
PROBLEMS COULD RESULT
2. Drop small aluminum inlet check ball into hole in
pump well.
3. Install pump return spring, pressing with finger to
center in pump well.
CAUTION: RETURN SPRING MUST BE
INSTALLED
WITH LARGER END AT
BOTTOM OF PUMP WELL; OTHER WISE,
PUMP FAILURE CAN RESUL
7:
4. Drop steel pump discharge ball into pump discharge
hole located beneath the venturi cluster. Ball is 3/16"
diameter (do not confuse with aluminum inlet ball). Install
pump discharge ball spring and retainer.
5. Install plastic main well inserts into the main fuel wells
located beneath the venturi cluster and make sure they are
seated in recesses provided. Then install venturi cluster and
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