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Form 63306—Canadian
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U. S. A.
STUDEBAKER 308S 336S
June, 1938
Reprinted December, 1945
1935 MOTOR SERIAL NUMBERS
No. 308S
Model T2 —CI37 and higher
Model T4 —CI12 and higher
Model T6 —Cl21 and higher
Model T8 —CIO2 and higher
1936 SERIAL NUMBERS —No. 336S
II/2-Ton Conventional—2T2-C30I and higher
11/2-Ton C. O. E.—2M2-C101 and higher
2-Ton Conventional—2W6-C101 and higher
2-Ton C. O. E.—2M6-CIOI and higher
21h-Ton—2W7-CIOI and higher
3-Ton—2W8-C30I and higher
Casting No. 51 on face of flange
DOWN-DRAFT CARBURETERS Nos. 308S-336S—LIST PRICE $ 17.65
A $2.50 exchange allowance is deducted from the list price if buyer turns
in old carbureter.
CARBURETER SPECIFICATIONS
For Studebaker Six Cylinder Truck Motor: 3¼ Inch Bore; 43/8 Inch Stroke
STUDEBAKER
TRUCKS
MODELS 1935—T2-T4-T6-T8-308S 1936—2M2-2T2-3365
( 308S Superseded by 413S 3365 Superseded by 357S
Dimensions: Flange size, 11/4 inch S. A. E. Primary venturi, 11/32 inch
I. D.
Secondary venturi, 11/16 inch I. D. Main venturi, 11/4 inch I. D.
Float Level: Distance from float (at free end) to float chamber cover
to be 3/8 inch when needle is seated.
Outside Vent: No. 10 drill size. No inside vent.
Gasoline Intake: Square vertical needle. No. 48 drill size hole in needle
seat.
Gasoline Line Connection: 1/4 inch S. A. E. elbow.
Low Speed Jet Tube: Jet, No. 70 drill size. By-pass in body, No. 55 drill
size. Economizer in body, No. 48 drill size.
Idle Port: Length, .200 inch; width, .030 inch.
Idle Port Opening: .016 to .020 inch with valve closed tight. Idle Bleed:
Size, No. 52 drill.
Idle Screw Seat: No. 46 drill.
Set Idle Adjustment Screw: Turn screw 1/4 to I turn open. .For richer
mixture, turn screw out. Do not idle engine below a speed equivalent
to 6 M. P. H. (360 R. P. M.).
Main Nozzle: In primary venturi, angle 30°. Size, No. 35 drill.
Metering Rod: (Standard) Economy step, .069 inch diameter. Middle step
tapers to .063 inch diameter. Power step, .044 inch diameter. Length,
3-25/64 inches.
Metering Rod Jet: No. 42 drill size.
Metering Rod Setting: Use gauge, Part No. T109-25 (2.795 inches).
Accelerating Pump: Low pressure type, with adjustable stroke. Pump jet:
No. 72 drill size.
Intake ball check, No. 62 drill size.
Discharge ball check, No. 45 drill size.
Relief disk check, No. 65 drill size.
Choke: Manual—Butterfly type, offset valve, with pressure relief 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 carbureter.
r
(Champion
No.7) Spark Plug Gap .025"
Set
Breaker Points
.020"
VALVE CLEARANCE
Set Valves
with Motor Cold
336S-308S Intake .016"-.006" Exhaust .016"-.010"
Correct Float Level
(Remove Cork Gasket
and measure from
machined surface of
float cover casting)
% Inch
Idle Adjustment
Screw Setting
¼ to I
Turn Open
Use Timing Light and Time
by Fly Wheel Mark.
308S—Breaker Points to Open
With Flywheel Set I" B.T.D.C.
3365—Breaker Points to Open
2° B.T.D.C.
CARBURETER
If carbureter loads up after considerable service, float level should be
checked. Wear on lip of float lever will raise float level. Float level
may be reset by,bending lip of float lever down to raise float level or
bending lever up to lower float level. Only a very slight bend is needed.
If motor stalls while idling, reset idle adjustment screw and throttle lever
adjusting screw. If these adjustments do not correct the trouble, remove
low speed jet tube and clean thoroughly with compressed air. Examine and
see that tube seats air-tight in body casting, top and bottom. If not, replace
with a new tube of identical specifications. NEVER CHANGE A LOW SPEED JET
TUBE FROM ONE CARBURETER TO ANOTHER.
Pump stroke adjustable for high or low temperatures. Set to longest
Poor acceleration may be due to damaged or worn plunger leather in accelerating
pump, corrosion in pump cylinder, loose or cracked cylinder, cracked plunger
cup or bent pump arm (parts which may be replaced at small cost). If plunger
is removed from cylinder, always use loading tool in re-assembling to avoid
damage to plunger leather.
stroke for cold weather, shorter stroke for hot weather driving
ADJUSTMENTS
Increased resistance on foot throttle indicates a clogged pump jet. Pump
jet should be removed and cleaned with compressed air, which, in many cases,
will remove the dirt or lint. However, it is usually advisable to replace
the pump jet, as its cost is nominal. All jets and ball checks must be seated
gasoline-tight.
Copyright 1938
by Carter Carburetor Corporation
All rights reserved.
CARTER SERVICE DISTRIBUTORS:
AUTO ELECTRIC SERVICE CO., Ltd., 1009 BAY ST., TORONTO, ONT.
BEATTIE AUTO ELECTRIC, Ltd., 176 FORT ST., WINNIPEG, MAN.
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