ROCHESTER CARBURETORS

Bulletin 9D-1 March 1, 1954
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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
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