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
	FORM NO. '1253 I.P.S.	PRINTED IN U.S.A.

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