ROCHESTER CARBURETORS Bulletin 9D-1 March 1, 1954
		ROCHESTER PRODUCTS CARBURETORS SERVICE   BULLETIN CARBURETOR    SPECIFICATIONS		BULLETIN 9D1 DATE 3-1-54 PAGE 1
	ITEM CHEVROLET CHEVROLET CHEVROLET CHEVROLET CHEVROLET CHEVROLET CHEVROLET CHEVROLET CHEVROLET Carburetor Part No. 7001374 7002050 7003152 7002051 7003060 7003160 7003526 7003863 7003865 7003864 7003986 7004495 7004468 Manufacturers Year 1937-40 1949-51 1950-51 1950-51 1952 1951 1951 1951 1953-54 Carburetor Model B B B B BC B B B B SAE Flange Size 1-1/4" 1-1/4" I-1/2" I-1/2" 1-1/2" 1-1/4" 1-1/2" 1-1/2" 1-1/2" Bore Diameter 1-1/2" 1-1/2" 1-9/16" 1-9/16" 1-9/16" 1-1/2" 1-9/16" 1-9/16" Primary Venturi 1-7/32" 1-7/32" 1-11/32" l-11/32" 1-11/32" 1-7/2" 1-11/32" 1-11/32" l"/32" Secondary Venturi 9/16" 9/16" 19/32" 19/32" 1-9/32" 1-9/16" 19/32" 19/32" 19/32" Nozzle Restriction .144" .144" .161" .161" .152" .144" .161" .152" .161" Main Metering Jet-Lean 7002651 .051" 7002650 .050" 7002657 .057" 7002657 .057" 7002656 .056" 7002650 .050" 7002657 .057" 7001860 .055" 7002957 .057" Main Metering Jet-Std. 7002652 .052" 7002651 .051" 7002658 .058" 7002658.058" 7002657 .057" 7002651 .051" 7002658 .058" 7002656 .056" 7002958 .058" Main Metering Jet-Rich 7002653 .053" 7002652 ,052" 7002659 .059" 7002659 .059" 7002658 .059" 7002652 .052" 7002659.059" 7002657 .057" 7002959 .059" Main Air Bleed Two-.028" Two-.028" Two-.028" Two-.028" Two-.028" Two-.028" Two-,028" Two-.028" Two .028" Fuel Valve Seat Diameter .086" .086" .086" .086" .086" .086" .086" .086" .086" Float Level (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" (A) 1-9/32" Float Drop (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" (B) 1-3/4" Idle Tube Restriction .093" .082" .061" .061" .063" .082" .061" .063" .070" Idle Bleed .046" .046" .046" .046" .028" .046" .046" .028" .028" Idle Adjusting Needle 7002357 30° 7002357 30° 7002357 30° 7002357 30° 7002357 30° 7002357 30° 7002357 30° 7002357 30° 7002357 30° Idle Needle Orifice .063" .063" .067" .067" .073" .063" .081" .073" .073" Secondary Idle Hole—Lower .034" .034" .031" .031" .040" .034" .033" .040" .042" Secondary Idle Hole—Center .031" .031" ------- ------- ------- .031" -------- ------- ------- Secondary Idle Hole—Upper .028" .028" ------- ------ .028" .028" .031" .028" .032" Spark Port Two -.040" Two .040" Two-.040" Two-.040" Two-.040" Two-.040" Two-.040" Two-.040" Two-.040" Power Restriction .030" .039" .040" .041" .046" .039" .040" .046" .043" Power Spring 7002071 7002071 7002366 7002366 7002366 7002071 7002366 7002366 7002366 Spring Color Zinc Plated Zinc Plated Red Red Red Zinc Plated Red Red Red Pump Jet Orifice .028" .028" .031" .031" .031" .028" .031" .031" .031" Pump Link lor rod) 7005136 7005136 7005136 7005136 7005136 7005136 7005136 7005136 7005136 CC per 10 Strokes 12-16 12-16 12-16 12-16 12-16 12-16 12-16 12-16 12-16 Choke Coil Setting -------- ------- ------- ------- Index ------- ------- ------- ------- Fuel Valve & Seat Assy- 7002359 7002359 7002359 7002359 7002359 7002359 7002359 7002359 7002359 Air Horn Gasket 7002894 7002894 7002894 7002894 7004480 7004480 7004480 7004480 7004480 Gasket Kit 7001386 7001386 7001386 7001386 7004085 7004595 7004595 7004595 7004595 Repair Kit 7004363 7004363 7004363 7004363 7004363 7004363 7004363 7004363 7004363
	NOTE: (A) Use Float Level Setting Gauge M-250 for all Chevrolet carburetors.		NOTE: (B) Use Float Drop Setting Gauge BT-93. Float drop is measured from bottom of gasket surface to bottom of floats with air horn held upright and floats freely suspended.	All tools and gauges are available through United Motor Service Distributors
	GO, WD, WDCC. 31, 38

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