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CARBURETOR-HOLEY
14-1
3
SUR
OF CARBURETOR
Fig. 1 &Measuring
the W e t Fuel level
(3) The fast idle speed adjusting screw should con-
tact the slowest speed step on the fast idle cam, as
shown in (Fig. 15).
(4) With the engine warmed-up to the normal op-
erating temperature, turn the fast idle speed adjust-
ing screw
in
or
out
to secure 700 r.p.m.
Reposition
the cam and throttle after every screw adiustment to
apply normal throttle closing torque.
Measuring the Wet Fuel level
With the engine running and the car on a level
floor, the fuel level can be checked or measured
through the economizer diaphragm opening. Using
a
6"
scale with a depth gauge, measure the distance
from the machined surface of the opening to the ex-
act fuel surface, as shown in (Fig. 16). The measure-
ment should be
2i/32".
Bowl Vent Adjustment
With the throttle valve at curb idle speed, it should
be possible to insert a
1/16''
(.0625")
drill between the
bowl vent and the seat, as shown in (Fig. 17). This
measurement should never exceed .090 inch
( 3 / 3 2 t t
drill.)
If an adjustment is necessary, bend the vent rod at
the horizontal portion until correct clearance has
been obtained. Be sure vent rod does not bind in the
guide after adjusting.
*After Approx. 500 Miles (If Necessary)
Spring Staged Choke Adjustment
To check the spring staged choke for correct oper-
BOWL VENT VA
,DRILL
O R
GAUGE
v
Fig. 17-M
easuring the Bowl Vent Opening
ating clearance, refer to (Fig. 18), then proceed as
follows:
The following steps are required to check this ad-
justment:
(1) With the choke closed, press the hub lever firm-
ly in the closing direction.
(2)
Check the clearance between the hub lever and
the shaft lever, as shown in (Fig. 18).
(3) The clearance in this position, should be from
.020
to
.040
inches.
(4)
If an adjustment is necessary, bend the lever
tang slightly, until correct clearance has been ob-
tained.
END TANG TO
4
OBTAIN CLEARANCE
Fig. 18-Spring
Staged Choke Clearance
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