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

tmp6CE-1.jpg
Rochester Carburetor
A GENERAL MOTORS PRODUCT A UNITED MOTORS LINE
tmp6CE-2.jpg
FORM 1235 I.P.S.
PRINTED IN U.S.A.

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