ROCHESTER CARBURETORS

Bulletin 9C-308 15 February 1957

	BULLETIN 9C-308 PAGE 4 OF 4
	QUICK REFERENCE SPECIFICATIONS CARBURETOR SPECIFICATIONS 7005140 SMALL VENTURI 19/32" LARGE VENTURI 1-15/32" MAIN METERING JETS .065 IDLE NEEDLE HOLES .073 SEC. LOWER .035 DISCHARGE MIDDLE HOLES UPPER .028 SPARK DRILLINGS .040 (2) PUMP JET .031 POWER RESTRICTIONS .052 IDLE TUBE RESTRICTIONS .063 ADJUSTMENTS 1954-57 DIMENSION GAUGE No. FLOAT LEVEL 1-9/32" M-250 FLOAT DROP 1 -3/4" BT-93 or Scale TUNE-UP SPARK PLUG GAP .035 BREAKER POINT GAP .018 CAM DWELL 38°-45° IGNITION TIMING 5° B.T.D.C. TAPPET CLEARANCE Int. .006" - Exh. .020" (Hot) IDLING R.P.M. 475
	CARBURETOR TOOLS AND GAUGES AS LISTED ARE AVAILABLE THROUGH UMS DISTRIBUTORS
		Rochester Carburetor A GENERAL MOTORS PRODUCT — A UNITED MOTORS LINE
	FORM 1235 I.P.S.	PRINTED IN U.S.A.

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