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Form 6482B—Canadian
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U. S. A.
PACKARD 5I2S
June, 1941
Reprinted September, 1945
MOTOR SERIAL NUMBERS
1941 — D400051 and higher 1942 — E30000I and higher
PACKARD EIGHT MODEL 1951 1941 MODEL 120 1942
Casting No. 371 on Face of Flange
Dual Down-Draft Climatic Control Carbureter—Model 512S—List Price
$44.10
A $10.00 exchange allowance is deducted from the list price if buyer turns
in old carbureter.
CARBURETER SPECIFICATIONS
For Packard 8 Cylinder Engine: 3¼ Inch Bore, 41/4 Inch Stroke
type. Main Nozzle: In primary venturi, angle 45°. Closed
diameter No. 30 drill.
Upper hole: .028 inch diameter on 45° angle. Lower hole: .0635 inch diameter
on 70° angle.
Metering Rod (Vacumeter Type): Economy step,
diameter.
Middle step tapers to .060 inch diameter. Power step, .050 inch diameter.
Length of rod, 2-59/64 inches.
Metering Rod Jet: 2.15 mm (.0846 inch) diameter. Metering Rod Setting: Use
gauge, part No. T109-113 inches).
Accelerating Pump: High pressure type (spring operated with adjustable pump
stroke.
Pump discharge jets (twin), size No. 70 drill.
Intake ball check, size No. 40 drill.
Discharge (needle seat), size No. 50 drill.
Outside relief to pump jet, none.
Pump Adjustment: 14/64 inch plunger travel (full throttle position) short
stroke. Use gauge T109-I 17S.
Choke: Carter Climatic Control, set at index. Butterfly type, off-set valve.
Choke heat suction hole, in body, size No. 32 (.I 16") drill.
Vacuum Spark Port: .039 to .041 inch diameter. Bottom of port .009 so .013
inch above valve.
Motor Tune-Up—Be Accurate! Always Use Feeler Gauges!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and
test compression before adjusting carburettor
Dimensions: Flange size, I inch dual, 4 bolt Primary venturi, 11/32 inch.
Secondary venturi, 21/32 inch.
Main venturi, II/g inch.
Float Level: Distance from float bowl cover, when needle is seated, to be
5/32 inch. (Use gauge No. T109-154.)
Vents: Outside, No. 10 drill—four holes. Inside, none. Gasoline Intake:
Square vertical needle. Size No. 38 drill hole in needle seat.
Gas Line Connection: 5/16 inch Weatherhead nipple.
Low Speed Jet Tube: Jet size, No. 70 drill. By-pass, size No. 52 drill.
Economizer, size No. 50 drill.
Idle bleed, size No. 54 drill.
Idle Ports: Upper port, slot type, length .165 inch; width .030 inch. Opening:
.135 to .141 inch above upper edge of valve with valve closed tight.
Lower Port: (For Idle Adjustment Screw) Size, .0615 to .0655 inch diameter.
Set Idle Adjustment Screw: I/2 to II/2 turns mixture turn screw out. Do not
attempt to 350 r.p.m.
open. For richer idle engine below
tip.
Inside
inch
.064
(2.280 lever)
Use Timing Light rn`°[ c`tnen"ct
Breaker Points to Open Set Valves Correct Float Level
Standard Head: 5° B.T.D.C. Intake .007" (Remove Cork Gasket)
Plus 0°, Minus 11/2° Exhaust .010" 5/32"
BRIEF CARBURETER ADJUSTMENTS
PUMP ADJUSTMENT: With pump connector link in place and throttle adjustment
screw backed out, pump plunger should travel 14/64" from closed to wide
open position. Adjustment can be made by bending throttle connector rod at
lower angle. (TTse tool T109-75.) Pump travel can be measured by placing
gauge T109-117S on rim of bowl cover around plunger shaft and measuring from
top surface of connector link at pump shaft.
METERING ROD ADJUSTMENT: Should be made when reassembling carbureter or when
leaner than standard rods are installed. (Do not disturb pump adjustment.)
Correct setting of metering rode is important. Procedure is as follows:
Copyright 1941
he Carter Carburetor Corporation All rights reserved.
Idle Adjustment Screw Setting
1/2 to (i/2 Turns Open
A. Insert two metering rod gauges, No. T109-113 in place of metering rods.
Be sure gauges seat in metering rod jets.
B. Install metering rod pin and pin spring in metering rod arm.
C. Rest screw driver lightly on metering rod arm until metering rod pin rests
on shoulders of notches in both gauges. A slight bend in metering rod arm
may be necessary to equalize.
D. With throttle salves seated and metering rod pin resting lightly on notches
in both gauges, tighten anti-percolator arm screw.
E. Remove gauges and metering rod pin and install metering rods, discs, metering
rod spring, pin and pin spring, and hook metering rod spring on metering
rods.
CARTER SERVICE DISTRIBUTORS:
AUTO ELECTRIC SERVICE CO., Ltd., 1009 BAY ST., TORONTO, ONT.
BEATTIE AUTO ELECTRIC, Ltd., 176 FORT ST.. WINNIPEG, MAN.
Spark Plug Gap .028" + .0025"
Set
Breaker Points
.0125" to .0175"
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