Carter Brass Bowl 153S

Carter Brass Bowl
Specifications
Flange Size: 1 1/8″,
Upper Well: Depth from stand pipe seat, 1/4″ 
Lower Well: 11/32″ ID
Float Level: Top of float to be 11/16″ from machined surface of casting at point opposite needle, with needle seated.
Inside Vent: No. 50 drill.
Gasoline Intake: Square vertical needle. No. 38 hole in needle seat.
Gas Line Connection: 5/16″
Low Speed Jet Tube: Jet, No. 70 drill.
Idle Port: Length .176″, Width: .030″. Opening above valve with valve closed tight: .034″ to .038″
By Pass: under idle port No. 54 drill.
Set Idle Adjustment Screw: 3/4 to 1 1/4 turn open. For richer mixture, turn screw in. Do not idle engine below 300 RPM with spark retarded.
Main Sell Jet No. 55 drill.
Multiple Jet Nozzle: Vertical jet, No. 48 drill. Top I.D. No. 26 drill size.
Accelerating Jets (Combination No. 70):
4 No. 60, 9/16″ from top.
2 No. 55, 1 5/16″ from top.
2 No. 55, 1 11/32″ from top.
Metering Rod: Diameter top, .070″; bottom .060″; length 4 57/64″.
Standpipe: Flare top 7/16″ ID with 5/16″ venturi. One No. 49 air hole in base. Two air slots .250″ – .254″ high by .380″ – .385″ wide.
Accelerating Pump: Low pressure type: Discharge jet, No. 72 drill; Feed to ball check, No. 45 drill. Connect plunger shaft to give longest stroke for winter driving, using shorter stroke for normal or hot weather.

Viewing Carburetor From Side Opposite Air Intake
Choker (compensating cone type): In venturi, lever at left. When open points down.
Throttle Lever: 1 1/4″ long at left side. In center of travel points up.
Tube Clamp: On air intake.
Float LevelSetting Float Level
Carburetor Adjustments

If carburetor loads up after considerable service, float level should be checked. Wear on lip of float level should be checked. Wear on lip of float lever will raise float level. Bending lip of float lever down will raise float level; bending lever up will lower float level. Only a slight bend is needed.

If motor stalls while idling, reset idle adjustment screw and throttle valve adjusting screw. If these adjustments do not correct the trouble, remove low speed jet tube and clean thoroughly with compressed air. Examine soldered joint in tube for air leaks 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 carburetor to another.

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. All jets and ball checks must be seated gasoline tight.

Poor acceleration may be due to damaged or worn plunger leather in accelerating pump, corrosion in pump cylinder, loose or cracked cylinder, cracked plunger or bent pump arm.

Pump stroke is adjustable for high or low temperatures. Set plunger pin in hole to give longest stroke for cold weather. Set pin in hole giving shorter stroke for hot weather driving.
Float Level
Brass Bowl Exploded View
2-43s
Throttle valve, bracket and rod assembly
49-63s
Pump assembly
3-96s
Throttle shaft and lever assembly
53-37s
Pump cylinder assembly
4A-17s
Throttle shaft dog
53A-33s
Pump arm assembly
11-94s
Low speed jet tube, size No. 66
53A-20s
Venturi choke cone assembly
11B-12
Rivet plug
58B-14
Choke cone arm
 
 
61-23
Plunger spring
12-128
Multiple jet nozzle, size vertical No. 48
61-28
Standpipe spring
14-92s
Choker shaft and lever assembly
61-30
Choker spring
15-27s
Body and bowl nut assembly
62-20s
Tube clamp assembly
20-10
Bowl gasket
64-21
Plunger leather
20-22
Needle seat gasket
 
 
21-29s
Float and lever assembly
 
 
23-20
Bowl
67-13
Ball check housing assembly
23A-14
Bowl ring gasket
86-10
Tube clamp lock washer
24-14
Float lever pin
86-11
Body flange lock washer
25-42s
Needle & seat assembly
100-10
Throttle lever adjusting screw
30-16
Ball check strainer
101-6
Tube clamp attaching screw
30A-29
Idle adjustment screw
101-11
Tube clamp attaching screw
36-13
Adjustment screw spring
101-17
Pump arm clamp screw
38-47as
Standpipe assembly
101-18
Body flange screw
39-10
Throttle valve screw
105-8
Tube clamp bolt
43-41s
Well jet assembly size No. 55 standard
105A-8
Tube clamp nut
43-47s
Well jet assembly size No 55 1/2 1 size lean
106-15
Choker shaft cotter pin
43-43s
Well jet assembly size No. 56 (std)
116-12
Pump jet ball
43B-10
Well jet gasket
136-12
Choke plate washer
48-21
Pump jet housing
150-13
Plunger pin
48-26s
Pump jet assembly, size No. 72
150-14
Plunger shaft pin
48B-14
Pump jet plug, size No. 72
150-15
Connector rod sleeve pin
49-17
Connector rod
150A-10
Pin spring
49-46s
Plunger assembly
156-15
Gas line nipple
49-66
Plunger shaft
 
 
 
 
 
 
Updated on 12/06/2020

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