Chevrolet with Old Carter Carburetors : CHEVROLET 1935 1936 1937 1938

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CHEVROLET 1935 1936 1937 1938

May, 1939
Reprinted December, 3.945
Carter Chev- Casting Ex-
Carbu- Carbu- No. on change
Year refer refer Car Face of List Allow-
No, Model Flange Price once
1935 *284S 837341 Master & Deluxe 20 Sup. by 569S
1935 321 S 837918 Fleet Economy 67 Sup. by 335S
1936 (Early) 319S 837894 Master & Deluxe 65 Sup. by 569S
1936 (Late) 334S 838013 Master & Deluxe 65 Sup.,by 569S
1936 335S 838047 Fleet Economy 79 17.65 2.50
1937 346S 838526 Master & Deluxe 92 Sup. by 420S
1937-38 358S 595959 Fleet Economy 05 Sup. by 492S
1938 3915 838682 Master & Deluxe 337 Sup. by 420S

CHEVROLET 1935 1936 1937 1938

Figure shows 1938 Carbureter,
No. 39I S
*See Form 6I47A for 284S as used in 1934.
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and test compression before adjusting carbureter.
PLUG POINTS Breaker Points to with Motor at Oper- (Remove Cork MENT
GAP Open sting Temperature Gasket) SCREW
Intake Exhaust
.032"-.035" .018" When ball in flywheel is In .006" .013" 3/8" I/2 to 111/2
line with pointer (octane
.040" .018" selector at zero) .010" .016" 3/8" /2 to II/2
5° B. T. D. C.
.032"-.035" .018" 5° B. T. D. C. .006" .013" 3/8" I to 2
.040" .018" 5° B. T. D. C. .010" .06" 3/8" I to 2
.037"-.042" .018" 5° B. T. D. C. .006" .013" 3/8" I to 2
.037"-.042" .018" 5° B. T. D. C. .010" .016" 3/8" I to 2
.040" .018" I 5° B. T. D. C. .006"/.008" .013"/.015" 3/8" I to 2
I935—Master -.--.-.-.-.
. 935—Economy ..
1936—Master _ . 936—Economy . _ I937—Master _...__-_ I937-38—Economy.... 938—Master
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 de not correct the trouble, remove low speed jet tube and clean thoroughly with compressed air. Examine and see that tube seats gasoline-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.
Increased resistance on toot 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.
Poor acceleration may be due to damaged or wr,rn plunger leather in accelerating pump, corrosion in pump cylinder, louse 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 reassembling to avoid damage to plunger leather.
Pump stroke adjustable for high or low temperatures. Set to longest stroke for cold weather, shorter stroke for hot weather driving.
Metering rod adjustment: Back out throttle lever adjusting screw, insert gauge (Part No. '1'109-25) in place of metering rod, seating tapered end in metering rod jet. Hold gauge vertical to in-sure seating. Metering rod pin in pump arm should rest at bottom of notch in gauge (A) with throttle fully closed and upper end of connector rod (13) centering freely in hole in pump arm. If it does not, adjustment can he made by bending connector rod at (C), using tool No. T109-75.

Remove gauge, replace metering rod and disk and metering rod spring. Be sure metering rod is in jet. II metering rod shows wear, re-place both metering rod and metering rod jet. Graphite grease should he put in hole in pump arm bracket before dust cover is replaced.
Copyright 1939