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10-34
PART
10·4
MOTORCRAFT MODEL 2100-D 2V CARBURETTOR
Section
1 Description and Operation
.............................................
10-34
2 Common Adjustments
&
Repairs
...................................
10-38
Idle Speed Adjustment... ................................................. 10-38
Idle Limiter Cap Replacement......................................... 10-40
3 Major Repairs Operations................................................ 10-43
D
DESCRIPTION AND OPERATION
DESCRIPTION
AUTOMATIC
E
The Motorcraft Model
21
00-D
2-
V
carburettor (Figs. 1, and 2) has two
main assemblies, the air hom and the
main body.
The air hom assembly, which
serves as the main body cover,
contains the choke plate, choke
diaphragtn assembly and the internal
vents for the fuel bowl.
The throttle plate, the accelerating
pump assembly, the power valve
assembly, and the fuel bowl are in the
main body. The automatic choke
housing is attached to the main body.
Each bore contains a main and
booster venturi, main fuel discharge,
accelerating pump discharge, idle
fuel dis<;:harge and a throttle plate.
The Motorcraft Model
21
00-D
2-
V
used on the 351-C engine has a
unique two-piece fast idle lever and
the crankcase emission hose connec-
tion is incorporated in the main body.
OPERATION
FUEL INLET SYSTEM
ACCELERATING
PUMP ASSEMBLY
V120~A
The amount of fuel entering the
fuel bowl (Fig. 3) is regulated by the
distance the fuel inlet needle is raised
off its seat and by fuel pump pres-
sure. Movement of the fuel inlet
needle in relation to the seat is con-
trolled by the float and lever assembly
which rises and falls with the fuel lev-
el. When the fuel in the fuel bowl
reaches a pre-set level, the float low-
FIG. 1 - Motorcraft Modei210Q-D, 2· V
Carburetor- Left Front 3/4 View typical
ers the fuel inlet needle
to
a position
where it restricts the flow of fuel, ad-
mitting only enough fuel to replace
that being used.
An integral retaining clip is at-
tached to the fuel inlet needle assem-
bly. The clip hooks over the tab on
the end of the lever of the float
as-
sembly. This clip assures reaction of
the fuel inlet needle to any downward
movement of the float.
A
wire-type
retainer
prevents
movement of the float shaft within
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