Carter YS Carbureter No. 950S

CARBURETER SPECIFICATIONS
For Willys 4 Cylinder Engine: 3 1/8 Inch Bore, 4 3/8 Inch Stroke
Dimensions: Flange size, 1 1/4 inch S. A. E.
Primary venturi, 11/32 inch I. D.
Secondary venturi, 19/32 inch I. D.
Main venturi, 1 1/4 inch I. D.

Float Setting: Distance from seam of float to float chamber
cover, with weight of float on needle and spring: 9/64 inch.

Vents: Balanced thru air horn to air cleaner via tubing external
to carbureter.
Vent: Bowl chamber to carbureter bore, size No. 68 (.031
inch) drill.

Gasoline Intake: Square vertical (spring loaded) needle No.
53 (.0595 inch) drill size in needle seat. Bleeder tube, as-
sembled over idle tube, with 2 side holes--No. 65 (.035 inch)
drill.

Low Speed Jet Tube: Jet size, No. 70 (.028 inch) drill (in end
of tube). Auxiliary jet (on side of tube) size: No. 75 (.021
inch) drill. By-pass (in air horn) size: No. 52 (.0635 inch)
drill. Economizer (in body) size: No. 54 (.055 inch) drill.

Idle Port: Upper port: slot type, length, .165 inch. Width,
.030 inch.

Idle Port Opening: Top of port--.125 to .129 inch above top
edge of valve with valve tightly closed.

Lower Port (For Idle Adjustment Screw): Size, .053 to .057
inch diameter.

Set Idle Adjustment Screw: 1/2 to 1 1/2 turns open. For richer
mixture, turn screw out. Idle engine at 700 R.P.M. with deep
fording vents open.

Main Nozzle: In primary venturi, angle 20°. Discharge jet size,
.0935 inch inside diameter. Main nozzle bleed (tube in air
horn) Size: No. 70 drill.

Metering Rod (Diaphragm operated): Economy step, .070 inch.
Power Step .054 inch diameter.
Vacuum passage restriction, size: No. 50 (.070 inch) drill
Vacuum passage bleed to bore, size: No. 65 (.035 inch) drill.

Metering Rod Jet: Size: .096 inch diameter.

Accelerating Pump: Diaphragm type, vacuum operated. Dis-
charge jet size, No. 72 drill. Intake ball check size: No. 40
drill. Discharge ball check under needle, size No. 50 drill.
Vacuum passage restriction, in flange size: No. 52 (.0635 inch)
drill. Vacuum passage air bleed to bore, size: No. 62 (.038
inch) drill.

Pump Stroke: No adjustment.

Choke: Manual--Offset, butterfly type with poppet valve.

Vacuum Spark Port: None.

CARBURETOR - ROCHESTER M4ME (CANADA)

1983 Fuel Systems ROCHESTER M4ME 4-BBL. - CANADIAN MODELS
DESCRIPTION & OPERATION
NOTE: Description & operation information not applicable.


ADJUSTMENTS
NOTE: Carburetor models M4ME in operation and adjustment procedures to the E4ME carburetor found the Domestic Car Tune-Up/ Mechanical Service and Repair manual. Carburetors with the "E" designation have a computer-controlled mixture control solenoid in place of the vacuum power piston and spring mixture control used on the Canadian models. The vacuum power piston mechanism is supplemented by a part throttle control which is factory calibrated to maintain emission standards and cannot be adjusted.


SPECIFICATIONS
ROCHESTER M4ME 4-BBL CARBURETOR SPECIFICATIONS
Application (Carb. No.) Specification
17083280, 17083281, 17083282, 17083283, 17082282, 17082283
Float Level .375"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) .875"
Choke Coil Lever .120"
Choke Rod 20°
Vacuum Break
Primary 25°
Secondary N/A
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 38°
Secondary lockout .015"
17082286 & 17082287
Float Level .40"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) .50"
Choke Coil Lever .120"
Choke Rod 19.5°
Vacuum Break
Primary 23°
Secondary 34°
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 35°
Secondary lockout .015"
17082296 & 1708297
Float Level .50"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) .875"
Choke Coil Lever .120"
Choke Rod 20°
Vacuum Break
Primary 25°
Secondary N/A
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 38°
Secondary lockout .015"
17080213 & 17082213
Float Level .375"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) 1.0"
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 40°
Secondary lockout .015"
17083290 & 17083292
Float Level .40"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) .875"
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 39°
Secondary lockout .015"
17083298
Float Level .375"
Accelerator Pump .281"
Idle Air Bleed N/A
Air Valve Spring (Number of Turns) 1.0"
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Rod .025"
Automatic Choke Tamper Resistant
Choke Unloader 40°
Secondary lockout .015"