Chevrolet with Old Carter Carburetors : CHEVROLET 1925 1926 1927 1928 1929 1930 1931

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CHEVROLET 1925 1926 1927 1928 1929 1930 1931

Form 6396B—Canadian


CHEVROLET 1925 1926 1927 1928 1929 1930 1931


July, 1939
Reprinted January, 1945
CARBURETER INDEX AND PRICE LIST
Carter Chevrolet List Exchanga
Year Carbureter Carbureter Car Model price Allow-
Number Number 'mice
1925-6-7 4S 344109 Superior Sup. by 1 1 IS
1927 85S 346896 Superior Sup. by I 1 I S
1927 11 1 S ........... Capitol 14.70 2.50
1928 102S 348538 National 14.70 I 2.50
1929 .I25S 835849 International Sup. by 150S
J929 I36S 836126 International Sup. by 150S
1930 150S 836300 Universal 14.70 2.50
1931 150S 836300 Independence $14.70 2.50
CHEVROLET
1925 thru 1931
Figure shows 1930-31 Carbureter,
No. 1505
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:


YEAR
MODEL
SPARK BREAKER IGNITION SET VALVES
PLUG POINTS TIMING With Motor at
GAP Breaker Points Operating
to Open Temperature
FLOAT LEVEL SET IDLE
(Remove ADJUST-
Cork Gasket) MENT
Top Dead Center Intake Exhaust
1925-6-7—4S .025 „ .020 Spark Fully Retarded 006” .008" 9/16" I to 11/2 Open
1927—85S-IIIS. .025" .020" Top Dead Center 006" .008" 9/16" 3/4 to 11/2 Open
Spark Fully Retarded
1928—1025 _ 025„ .020 25° B. T. D. C. 006" .008" 31 /64" 1 to 11/2 Open
Spark Fully Advanced
1929—125S .024" .018" 15° B. T. D. C. 006" .008" 3/4" n
Spark Fully Advanced 5/g to 1¼ Open
1929-30-3 I— 12° B. T. D. C.
I50S .024" .018" Spark Fully Advanced 006" .008" 3/4" 5/8 to 1¼ Open
CARBURETER ADJUSTMENTS
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 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 AN-OTHER.
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.
Poor acceleration may be due to damaged or worn plunger leather in accelerating purnp, 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.
Pump stroke on carbureters I36S and 150S adjust-able for high or low temperatures. Set to longest stroke for cold weather, shorter stroke for hot weather driving.
Coovright 1989