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PART 10-4 MOTORCRAFT MODEL 2100 CARBURETTOR
10-43
groove of the fuel inlet needle
seat.
5.
Refer to Float Adjustment
-
Dry,
and perform a dry float fuel level
adjustment on the
float.
6.
Install the carburettor air horn and
gasket and related
parts.
Refer to Air Horn
to Main Body Gasket Replacement.
7.
Refer
to
Fuel
Level
Float
Adjustment - Wet, and perform the wet
fuel level adjustment procedures.
8.
Adjust the idle fuel mixture and
engine idle
speed.
ACCELERATING PUMP
DIAPHRAGM AND/OR
ELASTOMER VALVE
REMOVAL
l.
Remove the carburettor air horn
to main body gasket following the
procedure under Air Horn to Main Body
Gasket Removal.
2.
Remove the ac;:celerating pump
operating rod retainer. To release the rod
from the retainer, press the tab ends of the
clip together, then, at the same time, press
the rod away from the clip until it is
disengaged.
Remove the rod. Remove the
accelerating
pump
cover,
diaphragm
assembly and spring.
3.
If inspection proves it necessary
to remove the Elastomer valve, grasp it
firmly and pull it out.
If
the Elastomer
valve tip broke off during removal, be sure
to remove the tip from the fuel bowl. An
Elastomer
valve
must
be
replaced
whenever it is removed from the main
body.
INSTALLATION
l.
If
the
Elastomer
valve
was
removed,
lubricate the tip of a new valve
and insert the tip into the accelerator
pump cavity. Using needle nosed pliers,
reach into the fuel bowl and grasp the
valve
tip.
Pull the valve in until it seats,
and cut off the tip forward of the retainer
shoulder. Remove the tip from the bowl.
2.
Position
the
new accelerating
pump diaphragm assembly to the cover
and place
the cover and diaphragm
assembly in position on the return spring
and
~in
body.
The large
end of the
spring must face the Elastomer Yalve.
•
~DIAPHRAGM
- , .
LINK
.__PIN
.,.__COVER
.....i...._
DIAPHRAGM
~ASSEMBLY
FIG.
18- Choke Diaphragm Assembly
Install the cover screws finger-tight. Push
the accelerating pump plunger the full
length of travel and tighten the cover
screws.
3.
Position the accelerating pump
operating rod in the inboard hole (hole
closest to the pump
plunger).
4.
Adjust
the
accelerating pump
stroke to specification.
5. Install the carburettor air horn and
gasket. Refer to the Air Horn to Main
Body Gasket Replacement.
EJ
MAJOR REPAIR OPERATIONS
CARBURETTOR REMOVAL
Flooding,
stumble on acceleration and
other performance complaints are in many
instances, caused by the presence of
dirt,
water or other foreign matter in the
carburettor. To aid in diagnosing the cause
of
complaint,
the carburettor should
be
carefully
removed
from
the
engine
without removing the fuel from the bowls.
The contents of the bowls may then be
examined
for
contamination
as
the
carburettor is disassembled.
l.
Remove the air cleaner as detailed
on page 10-67. Remove the heater hose
from the choke shield (if so equipped).
2.
Remove the throttle cable or rod
from the throttle
lever.
Disconnect the
distributor vacuum line, in-line fuel filter
and the choke heat tube at the carburettor.
3. Disconnect the choke clean air
tube from the air
horn.
4.
Remove the carburettor retaining
nuts; then remove the carburettor. Re-
move the carburettor mounting gasket,
spacer (if equipped) and lower gasket,
from the intake manifold.
CHOKE DIAPHRAGM ASSEMBLY
REMOVAL
l.
Remove the
air
cleaner.
2.
Remove the diaphragm cover
attaching screws, then lift the cover,
diaphragm assembly and spring from the
air hom
(Fig.
18). It will not be necessary
to remove the diaphragm stop screw on
the underside of the air hom.
3.
Remove the diaphragm rod from
the end of the
lever.
INSTALLATION
l.
Position the diaphragm spring in
the
air
horn. Place the cover on top of the
diaphragm, then attach the diaphragm rod
to the end of the lever.
2.
Install the cover attaching screws
and tighten to the specified torque.
3.
Set the choke plate pulldown and
fast idle cam clearance.
4.
Tighten the air cleaner anchor
screw to the specified torque to help
provide a vacuum seal between the
air
hom and main body. The choke dia-
phragm vacuum passage is in the rear
portion of the carburettor.
5.
Install the air cleaner.
POWER VALVE TEST
A power valve must not be replaced
unless it is leaking sufficiently to cause an
unadjustable rough engine idle condition.
Fuel accumulation in the power valve
cover does not necessarily indicate a
damaged power
valve.
Fuel vapors
will
be
drawn into the vacuum side of the power
valve and condense during periods of
deceleration.
Leakage in the power valve
area can be caused by an improperly
tightened cover or damaged gaskets. Any
gasket
sealing
deficiencies
must
be
corrected before
the power valve is
replaced.
If power valve leakage is suspected,
carry
out test procedure as detailed in
(Page 10-6)
INSTALLATION
1. Clean the gasket mounting sur-
faces of the spacer and carburettor.
Place the spacer between two new gaskets
and position the spacer and gaskets on the
intake manifold. Position the carburettor
on the spacer and gasket and secure it with
the retaining lockwashers and nuts. To
prevent leakage, distortion or damage to
the carburettor body flange, snug the nuts;
then, alternately tighten each nut in a
criss-cross pattern to the specified torque.
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