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1940 Willys Overland Model 440
Form 64048—Canadian
REPLACING ALL PREVIOUS FORMS
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U.S.A.WILLYS-OVERLAND 450S
December, 1939
Reprinted February, 1945
CAR AND MOTOR NUMBERS
440—1700 I and higher
CARBURETER No. 450S
ALSO APPLICABLE TO
1937 1938 1939 WILLYS
OVERLAND
MODEL "440"
1940
Casting Number 200 on face of flange
WO Down-Draft Carbureter 450S—List Price $ 17.65
A $2.50 exchange allowance is deducted from the list price if buyer turns
in old carbureter.
CARBURETER SPECIFICATIONS
For Willys-Overland—4 Cylinder Engine, 31/8" Bore, 4%" Stroke
Dimensions: Flange size, I inch S. A. E. Primary venturi, 11/32 inch
I. D. Main venturi, 1.0 inch I. D.
Float Setting: Distance from float (at free end) to float chamber cover
to be 3/8 inch with free weight of float on needle and spring (see cut.)
Vents: Outside, No. 10 drill size. Inside, none. Idle well to bowl fuel chamber
No. 30 drill.
Gasoline Intake: Square vertical needle. No. 53 drill size in needle seat.
Gasoline Line Connection: 1/4 inch weatherhead nipple.
Low Speed Jet Tube: Jet size, No. 70 drill. Idle well jet, No. 61 drill.
By-pass in body, .059 to .060 inch diameter.
Economizer in body, .0425-.0435 inch diameter. Idle bleed, size No. 52 drill.
Idle Port: Length, .140 inch. Width, .030 inch.
Idle Port Opening: .086 to .090 inch (above upper edge of valve) with valve
tight closed.
Idle Screw Seat: No. 46 drill.
Set Idle Adjustment Screw: 1/2 to 21/2 turns open. For richer mixtures, turn
screw out. Do not attempt to idle engine be-low 8 miles per hour.
Vacuum Spark Port: .062 to .064 inch diameter. Top of port .056 to .062 inch
above upper edge of valve.
Main Nozzle: In primary venturi, angle 30°. Discharge jet size, .096
inch diameter.
Metering Rod: Economy step, .0695 inch diameter, second step tapers to .06525
inch diameter. Third step tapers to .05825 inch diameter. Power step, .056
inch diameter. Length 3-25/64 inches.
Metering Rod Jet: Size, .078 inch diameter.
Metering Rod Setting: Use gauge, part No. T109-26 (2.718 inches).
Accelerating Pump: High pressure type, spring operated. Discharge jet size;
No. 73 drill.
Intake ball check size, No. 40 drill.
Discharge disk check size No. 40 drill.
Relief passage to outside, size No. 42 drill.
Pump Adjustment: 17/64 inch plunger travel at full throttle position. Use
gauge T109-I 17S.
Choke: Manual—Butterfly type, with pressure relief poppet valve, inter-connected
to open throttle valve to fast idle position when choke is used.
Motor Tune-Up—Be Accurate! Always Use Feeler Gauges!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and
test compression before adjusting carbureter.
Spark Set
Plug Gap Breaker Points
.030" .020"U=~
Use Timing Light
Breaker Points to
Open at
Top Dead Center—
No. I Cylinder
Set Valves
(Cold)
Intake .014"
Exhaust .014"
Correct Float Level
(Measure from machined
surface of casting)
Idle Adjustment
Screw Setting 1/2 to 21/2 Turns Open
Copyright 1939
by Carter Carburetor Corporation All rights reserved.
CA BURS ER
Registered inn . S. Patent Office