1983 Chevrolet Step Van P20, 6.2 J, StandardFACTORY OEM SERVICE PROCEDURE

Carburetor - ROCHESTER M4MC & M4ME 4-Bbl: Specifications

CARBURETOR ADJUSTMENT SPECIFICATIONS

Application (Carb. No.) Specification
17080201
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 23°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080205
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 23°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080206
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 23°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080212
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary 24°
Secondary 30°
Air Valve Spring (1) 3/4
Auto Choke (2) TR
Choke Unloader 40°
17080213
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17080290
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080291
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080292
Float Level 15/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 42°
17080298
Float Level 3/8""
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17080507
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17080512
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary 24°
Secondary 30°
Air Valve Spring (1) 3/4
Auto Choke (2) TR
Choke Unloader 40°
17080513
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17082213
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17082513
Float Level 3/8"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 37°
Vacuum Break
Primary 23°
Secondary 30°
Air Valve Spring (1) 1
Auto Choke (2) TR
Choke Unloader 40°
17083220
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083222
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083223
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083224
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083225
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083226
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083227
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083230
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083231
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083234
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083235
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 26°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083290
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083291
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083292
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
17083293
Float Level 13/32"
Accelerator Pump
Stem 9/32"
Hole Inner
Choke Coil Lever .120"
Choke Rod 46°
Vacuum Break
Primary N/A
Secondary 24°
Air Valve Spring (1) 7/8
Auto Choke (2) TR
Choke Unloader 39°
(1) Specification is amount of turns.
(2) TR = Tamper Resistant.
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