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14-46
CARBURETOR-WW3
rod at the upper angle, using Tool T109-213, until
the correct valve opening has been obtained. Refer to
(Fig. 17).
Vucuum
Kick
Adjustment
(This test can be made
On
or
Off
the vehicle.)
The choke diaphragm adjustment controls the fuel
delivery while the engine is running. It positions the
choke valve within the air horn by action of the link-
age between the choke shaft and diaphragm. The dia-
phragm must be energized to measure the vacuum
kick adjustment. Use either a distributor test machine
with a vacuum source or vacuum supplied by another
vehicle. Adjust as follows:
(1) With the engine
Not
running, open the throttle
valves far enough to allow the choke valve to be
moved to the closed position.
(2) Disconnect the vacuum hose from the dia-
phragm and connect the hose from the vacuum supply
as shown in (Fig.
18).
(A minimum of 10 inches of
mercury (HG) will be required.)
(3) Insert the specified drill or gauge between the
choke valve and the wall of the air horn. Refer to (Fig.
18). Apply sufficient closing pressure on the choke
shaft lever to provide the smallest choke valve open-
ing possible without distortion of the diaphragm
link. Note that the link must deflect a wire spring be-
fore it reaches the end of travel within the lever slot.
The link must travel to the end of the slot for proper
measurement of the kick adjustment.
(4)
An adjustment will be necessary if a slight drag
is not obtained as the drill or gauge is being removed.
The adjustment of this opening will require the re-
moval of the choke operating link.
CAUTION: Damage to the diaphragm and the choke
lever slot can result, if the link is not removed for
the bending operation.
(5)
Remove the clip and disengage the choke oper-
ating link from the choke lever, then disengage the
link from the diaphragm stem. (The best bending re-
sults
will be obtained by using a vise and a pair of
pliers.)
(6)
Bend the choke operating link at the angle to
provide the correct choke valve opening.
Fig.
19-Choke
Operating Link Measurement
V A
)
N K
LVE
' 4 1
Fig. 2 W h o k e Operating Link Clearances
CAUTION: A correction in the length of the link
of
.010
inch, will result in a change of
.020
inch in
the choke valve opening.
As an example, if the choke valve opening is .020
inch in error, the correction in the link length would
be .010 inch.
A "2" inch micrometer will be helpful in estab-
lishing the original length of the link, as shown in
(Fig. 19), before completing the adjustment.
(7)
Install the choke operating link and recheck the
choke valve opening, using a drill or gauge. Refer to
(Fig. 18).
(8) Reinstall the vacuum hose to the diaphragm
and with no vacuum applied to the diaphragm,
some clearance should exist between the choke op-
erating link and the choke lever slot, in both the open
and closed choke positions, as shown in (Fig. 20).
This
clearance i s necessary to allow the choke valve to close
for starting as well as fully open after the engine
reaches normal operating temperature.
If a clearance does not exist in both
of
these posi-
tions, a recheck of the operating link adjustment
should be made.
NOTE: Free movement of the choke valve between
the closed and open positions is very necessary.
This free movement should also exist between the
kick and the open choke valve positions with the en-
gine running. If binding does exist, the choke oper-
ating link has been improperly bent and should be
corrected.
Unloader Adjustment (Wide Open
KicM
(1)
To make the unloader adjustment, lightly hold
the choke valve closed, then open the throttle valves
to
wide open position. The choke valve should open
sufficiently
to
allow a
51ho''
drill to be inserted be-
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