Carburetor Bench Adjustments; Float Adjustments; Accelerator Pump Adjustments; Float Drop - Lincoln Continental 1964 Shop Manual

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PART 10-1- GENERAL FUEL SYSTEM
EJ
COMMON ADJUSTMENTS AND REPAIRS
CARBURETOR BENCH
ADJUSTMENTS
All carburetor adjustments except
the idle fuel mixture and the idle
speed adjustments can be made with
the carburetor removed from the car.
All adjustments except the float
adjustments, the bench fast idle speed
adjustment and the secondary throttle
lever adjustment can be made with
the carburetor mounted on the
engine.
In the process of rebuilding a car-
buretor, the bench adjustments
should be made in the following
sequence:
FLOAT ADJUSTMENTS
There are three adjustments that
should be made on each float and
lever assembly. The adjustments are
made in the following order:
Float Alignment
1. Sight down the side of each
float shell to determine if the side of
the float is parallel to the outer edge
of the air hom casting (Fig. 3).
2. To adjust float alignment, bend
the float lever by applying pressure
to the end of the float shell with the
fingers while supporting the float
lever with the thumb to prevent dam-
age to the float. Apply only enough
pressure to btmd the float lever.
3. After aligning the float, remove
as much clearance as possible be-
tween the arms of the float lever and
the lugs on the air horn by bending
the float.Iever. The arms of the float
lever should operate freely and be as
parallel to the inner surfaces of the
lugs on the air horn as possible.
TO ADJUST,
BEND FLOAT
LEVER
81938-A
FIG.
3-Fioat Alignment
FIG.
4-Fioat SeHing
I•'Ioat Setting
1. With the air horn inverted, the
air horn gasket in place, and the fuel
inlet needle seated, check the clear-
ance between the end of each float
and the air horn gasket (Fig. 4).
The clearance should be within spt!ci-
fication.
2. Bend the float arm up to in-
crease the clearance or down to de-
crease the clearance (Fig. 4). Apply
only enough pressure to bend the
float arm.
Float Drop
1. With the air horn held in an
upright position, measure the dis-
tance between the top of each float
and the air horn gasket at the free-
end of each float (Fig. 5). The
distance should be within specifica-
tion.
FIG.
5-Fioat Drop
TO ADJUST, BEND
FLOAT ARM WITH
10-5
81939-A
2. Bend the stop tab on the float
bracket, as necessary, to adjust the
drop.
ACCELERATOR PUMP
ADJUSTMENTS
Operating Rod
1. With the accelerator pump op-
erating rod in the top hole (long
pump stroke) of the pump arm and
the throttle plates closed, measure
the distance from the top surface of
the air horn to the top of the plunger
shaft (Fig. 6) . The distance should
be within specification.
2. To adjust the distance, bend
the accelerator pump operating rod
at the existing lower bend, as neces-
sary (Fig. 6).
Pump Stroke. The accelerator
pump stroke adjustment compensates