ROCHESTER CARBURETORS

Bulletin 9C-325 15 December 1957
BULLETIN 9C-325
PAGE 4 OF 4
QUICK REFERENCE SPECIFICATIONS
1957
1958
u.
s.
CANADA
U. S.
Carburetor No.
7009657
7009656
7011657
7011656
7012127
7012129
7011102
Bore
1-9/16"
1-9/16"
1-9/16"
1-9/16"
1-9/16"
1-9/16"
1-9/16"
Large Venturi
1-11/32"
1-11/32"
1-11/32"
1-11/32"
1-11/32"
1-11/32"
 1-11/32"
Main Metering Jets
.058
.058
.058
.058
.057
.057
.056
Idle Needle Holes
.073
.073
.073
.073
.080
.080
.080
Sec.
Lower
.040
.040
.040
.040
.040
,040
.040
Discharge .
Middle
.028
.028
.028
.028
.028
.028
.028
Holes
Upper
—
—
—
_
—
—
Spark Drillings
(4).050
[4).050
(4).050
(4).050
(4).050
(4).050
(4).050
Pump Jets
.031
.031
.031
.031
.031
.031
.031
Power Restrictions
.046
.046
.045
.045
.045
.045
.048
Choke Res.
Channel
.101
.089
.101
.089
—
—
_„
By-Pass
—
—
—
.040
.040
.089
Idle Tube Res.
.065
.065
.065
.065
.070
.073
.074
Adjustments
DIMENSIONS
Gauge No.
Float Level
1-9/32"
1-9/32"
1-9/32"
1-9/32"
1-9/32"
1-9/32"
1-9/32"
M-250
Floa! Drop
1-3/4"
1-3/4"
1-3/4"
1-3/4"
1-3/4"
1-3/4"
1-3/4"
BT-93 or Scale
Automatic Choke
3 N. L.
3 N. L.
3 N. L.
3 N. L.
1 N. L.
1 N. L.
INDEX
--------
Choke Rod
.076
.076
.076
.076
.076
.076
.076
BT-99
Unloader
.230
.230
.230
.230
.230
.230
.230
BT-99
1957
1958
Tune-up
SYNCHROMESH

AUTO. TRANS.
SYNCHROMESH

AUTO. TRANS.
Spark Plug Gap
.035
.035
.035
.035
Breaker Point Gap
.016
.016
.016
.016
Cam Dwell
28°-35"
28° -35°
28°-35°
28° -35°
Ignition Timing
T. D. C.
T. D. C.
1. D. C.
T. D, C.
HYDRAULIC
HYDRAULIC
HYDRAULIC
HYDRAULIC
Idle R.P.M.
475
425 DR.
475
425 DR.
CARBURETOR TOOLS AND GAUGES AS LISTED ARE AVAILABLE THROUGH UMS DISTRIBUTORS
Rochesfer Carburetor
A GENERAL MOTORS PRODUCT — A UNITED MOTORS LINE
tmp4EC-1.jpg
FORM NO. '1253 I.P.S.
PRINTED IN U.S.A.

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