ROCHESTER CARBURETORS
Bulletin 9C-326 15 December 1957
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Rochester Carburetors
MODEL 2GC
1958 CHEVROLET "V-8"
ADJUSTMENTS AND SPECIFICATIONS
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BULLETIN 9C-326
PAGE 3 OF 4 DATE:
12/15/57
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SETTING: 1-19/64"~GAUGE, BT-144
With the air horn inverted and the gasket
in place, position the float level gauge over the float so that it
rests against the pump side of the power piston shaft, with the outer
gauge leg in line with the center of the float. Bend the float arm to
adjust.
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SETTING: 57/64"~GAUGE, BT-144
With the idle screw backed out and the
throttle valves completely closed, bend the pump rod as necessary with
tool BT-18 to obtain the proper measurement from the top of the air
horn casting to the top of the pump rod.
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SETTING: 1-29/32"-GAUGE, BT-134
Bend the float tang as required to obtain
a distance of 1-29/32" from the
gasket surface to the bottom of the float,
with the air horn upright and the
float hanging free. Use scale
or scribed mark
on float and pump gauge.
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SETTING: 49/64"~GAUGE, BT-144
Note: Make pump rod adjustment before
adjusting idle vent valve. Place Gauge BT-144 on top of pump housing
on air horn, as shown, with leg of gauge marked "Vent" above pump rod.
Slowly open throttle valves until vent valve just closes. With
throttle valves held in this position, lower edge of gauge
leg marked "Vent" should just
touch top of pump rod. To adjust bend tang on pump lever as
shown.
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SETTING - INDEX
Loosen the three retaining-screws and
rotate the choke cover counter-clockwise against coil tension until
the index, mark is in line with the index point on the choke housing.'
At room temperature the choke valve should be lightly closed.
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SET MARK ON COVER TO SPECIFIED
POINT ON CHOKE HOUSING
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AUTOMATIC CHOKE ADJUSTMENT
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CO, WD, 131, 149, 9X, 9FR, 9FD
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FORM 1254 I.P.S. PRINTED IN U.S.A.
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