ROCHESTER 2G, 2GC, 2GV 2-Barrel: Adjustment: Notes

IDLE SETTING CAUTIONS (CARS WITH IDLE COMPENSATOR) - Make sure that idle compensator is closed when adjusting idle speed. If necessary, idle compensator valve can be held closed with a pencil. After idle speed is adjusted, press down on idle compensator valve to see if speed is affected, if speed drops, readjust idle speed, being sure that idle compensator valve is closed.

BUICK NOTE - Transmission idle stator switch must be closed when making idle adjustment. Check by disconnecting switch connector. If idle speed does not decrease, switch was not closed. Adjust switch and readjust idle speed and mixture. On cars with Automatic Level Control, vacuum hose must be disconnected at compressor tank end and plugged when making idle speed and mixture adjustment.

CHEVROLET NOTE - On cars with Automatic Level Control, idle adjustment must be made exactly as follows: Adjust Level Control reservoir pressure to 70 lbs. (use Shrader valve on compressor), adjust idle mixture with compressor operating, then with compressor off (crimp hose or disconnect hose and block vacuum source), check idle speed and adjust as necessary, then readjust idle mixture for best compromise between compressor operating and compressor not operating conditions.

1959-65 CARBURETOR ADJUSTMENT SPECIFICATIONS

Rochester Carb. No.

Hot Idle Speed (Engine RPM)

Float Setting ⁽¹⁾

Choke Setting

Choke Rod Setting⁽¹⁾

Unloader Setting

Accel. Pump Rod Setting⁽¹⁾

Idle Vent ⁽¹⁾

Synchro-mesh

Auto. Trans.

Level

Drop

7013007

475

..........

1 11/32" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7013008

..........

450 ⁽²⁾

1 11/32" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7013018

..........

450 ⁽²⁾

1 11/32" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7013052

460

460 ⁽²⁾

3/4" ⁽⁵⁾

1 29/32"

Index

.150"

.163"

1 7/16" ⁽⁷⁾

1 11/32"

7013058

520 (23)

520 ⁽²⁾(23)

3/4" ⁽⁵⁾

1 29/32"

Index

.150"

.163"

1 7/16"⁽⁷⁾

1 11/32"

7013060

..........

480-500 ⁽²⁾(23)

5/8" ⁽⁵⁾

1 29/32"

Index

.055"

.163" ⁽⁶⁾

1 5/16"

1 9/32"

7013061

480-500 (23)

..........

5/8" ⁽⁵⁾

1 29/32"

Index

.055"

.163" ⁽⁶⁾

1 5/16"

1 9/32"

7013069

..........

480-500 ⁽²⁾ (23)

11/16" ⁽⁵⁾

1 29/32"

Index

.056"

.163" ⁽⁶⁾

1 3/16"

1 9/64"

7013075

480-500 (23)

..........

11/16" ⁽⁵⁾

1 29/32"

Index

.056"

.163" ⁽⁶⁾

1 3/16"

1 9/64"

7013082

475

450 ⁽²⁾

1 11/32" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

57/64"

7015052

460

460 ⁽²⁾

11/16" ⁽⁵⁾

1 3/4"

Index ⁽⁸⁾

.150"

.163"

1 7/16"

1 11/32"

7015058

520 (23)

520 ⁽²⁾⁽⁴⁾

11/16" ⁽⁵⁾

1 3/4"

Index ⁽⁸⁾

.150"

.163"

1 7/16"

1 11/32"

7015062

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7015070

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.070"

.163"

1 21/64"

1 17/64"

7015072

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.070"

.163"

1 21/64"

1 17/64"

7015073

480-500 ⁽³⁾

..........

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019007

475

..........

1 11/32" ⁽⁴⁾

1 29/32"

1 Lean

.089"

.360"

1 1/8"

7019008

..........

450 ⁽²⁾

1 11/32"⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7019018

475

450 ⁽²⁾

1 11/32" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7019042

..........

525 ⁽¹¹⁾⁽¹²⁾

11/16" ⁽⁵⁾

1 29/32"

1 Rich

.036"

.081"

1 1/8"

...........

7019052

550

500 ⁽²⁾

⁽⁹⁾⁽⁵⁾

⁽¹⁰⁾

Index

.150"

.163"

1 7/16"

1 11/16"

7019058

550

500 ⁽²⁾

⁽⁹⁾⁽⁵⁾

⁽¹⁰⁾

Index

.150"

.163"

1 7/16"

1 11/16"

7019060

480-500 ⁽³⁾

..........

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019070

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 21/64"

1 17/64"

7019071

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 21/64"

1 17/64"

7019072

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 21/64"

1 17/64"

7019073

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 21/64"

1 17/64"

7019074

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019075

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019076

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019077

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7019090

..........

525 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

..........

7019092

550

..........

9/16" ⁽⁵⁾

1 13/16"

1 Lean

.082"

.250"

1 3/16"

...........

7019093

525

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

...........

7019095

..........

500 ⁽²⁾⁽¹³⁾

9/16" ⁽⁵⁾

1 13/16"

1 Lean

.082"

.250"

1 3/16"

...........

7019860

..........

580-600 ⁽²⁾⁽¹⁴⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

........

7019863

580-600 ⁽¹⁴⁾

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

.........

7020007

500

..........

1 11/16" ⁽⁴⁾

1 29/32"

1 Lean

.089"

.360"

1 1/8"

7020008

..........

475 ⁽²⁾

1 11/16" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7020018

500

475 ⁽²⁾

1 11/16" ⁽⁴⁾

1 29/32"

Index

.089"

.360"

1 1/8"

7020046

...........

525 ⁽²⁾⁽¹²⁾

23/32" ⁽⁵⁾

1 29/32"

Index

.095"

.250"

1 7/16"

........

7020047

..........

525 ⁽²⁾⁽¹²⁾

23/32" ⁽⁵⁾

1 29/32"

Index

.095"

.250"

1 7/16"

.........

7020048

..........

525 ⁽²⁾⁽¹²⁾

23/32" ⁽⁵⁾

1 29/32"

Index

.095"

.250"

1 7/16"

...........

7020049

..........

525 ⁽²⁾⁽¹²⁾

23/32" ⁽⁵⁾

1 29/32"

Index

.095"

.250"

1 7/16"

..........

7020051

..........

500 ⁽²⁾

35/64" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020052

550

500 ⁽²⁾

⁽¹⁵⁾⁽⁵⁾

1 13/16"

1 Lean

.150"

.160"

1 7/16"

1 11/32"

7020053

550

..........

35/64" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020058

550

500 ⁽²⁾

⁽¹⁵⁾⁽⁵⁾

1 13/16"

1 Lean

.150"

.160"

1 7/16"

1 11/32"

7020060

480-500 ⁽³⁾

..........

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7020070

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 3/4"

1 17/64"

7020071

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 3/4"

1 17/64"

7020072

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 3/4"

1 17/64"

7020073

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.163"

1 3/4"

1 17/64"

7020074

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7020075

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7020076

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7020077

..........

480-500 ⁽²⁾⁽³⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.056"

.163"

1 1/8"

1 5/64"

7020140

..........

575 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

1 Lean

.052"

.180"

..........

7020141

575

..........

21/32" ⁽⁵⁾

1 29/32"

1 Lean

.052"

.180"

..........

7020142

..........

575 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

1 Lean

.052"

.180"

..........

7020143

575

..........

21/32" ⁽⁵⁾

1 29/32"

1 Lean

.052"

.180"

..........

7020146

..........

525 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

..........

7020147

525

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

..........

7020954

550

500 ⁽²⁾

⁽¹⁵⁾⁽⁵⁾

1 3/4"

1 Lean

.150"

.160"

1 7/16"

1 11/32"

7020956

550

500 ⁽²⁾

⁽¹⁵⁾⁽⁵⁾

1 3/4"

1 Lean

.150"

.160"

1 7/16"

1 11/32"

7020957

..........

500 ⁽²⁾

35/64" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020959

550

..........

35/64" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020980

..........

500 ⁽²⁾

25/32" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020981

550

..........

25/32" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020982

..........

500 ⁽²⁾

25/32" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7020983

550

..........

25/32" ⁽⁵⁾

1 13/16"

Index

.082"

.260"

1 3/16"

..........

7023007

450-500

..........

3/4" ⁽⁵⁾

1 29/32"

Index

.090"

.360"

1 1/8"

7023008

..........

450-500 ⁽²⁾

3/4" ⁽⁵⁾

1 29/32"

1 Lean

.090"

.360"

1 1/8"

7023018

..........

450-500 ⁽²⁾

3/4" ⁽⁵⁾

1 29/32"

1 Lean

.090"

.360"

1 1/8"

7023041

475

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.095"

.260"

1 7/16"

..........

7023042

..........

475 ⁽¹¹⁾⁽¹⁷⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.095"

.260"

1 7/16"

..........

7023043

..........

475 ⁽¹¹⁾⁽¹⁷⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.095"

.260"

1 7/16"

..........

7023046

..........

500 ⁽²⁾⁽¹⁸⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

..........

7023047

500 ⁽¹⁸⁾

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 11/32"

..........

7023048

..........

550⁽²⁾⁽¹⁸⁾

21/32" ⁽⁵⁾

1 29/32"

1 Rich

.055"

.160"

..........

7023049

550 ⁽¹⁸⁾

..........

21/32" ⁽⁵⁾

1 29/32"

Index

.055"

.160"

..........

7023052

550

500 ⁽²⁾

13/32" ⁽⁵⁾

1 3/4"

1 Lean

.150"

1 7/16"

1 11/32"

7023053

550 ⁽¹⁸⁾

500 ⁽²⁾⁽¹⁸⁾

13/32" ⁽⁵⁾

1 3/4"

1 Lean

.150"

1 7/16"

1 11/32"

7023056

550

500 ⁽²⁾

25/32" ⁽⁵⁾

1 13/16"

Index

.080"

.260"

1 3/16"

..........

7023058

600 ⁽¹⁴⁾

600 ⁽²⁾⁽¹⁴⁾

25/32" ⁽⁵⁾

1 13/16"

Index

.080"

.260"

1 3/16"

..........

7023060

..........

480-500 ⁽²⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.160"

1 11/32"

1 9/32"

7023061

..........

480-500 ⁽²⁾⁽¹⁴⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.160"

1 11/32"

1 9/32"

7023062

..........

480-500 ⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.160"

1 11/32"

1 9/32"

7023063

..........

480-500 ⁽²⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.055"

.160"

1 1/8"

1 3/32"

7023064

..........

480-500 ⁽²⁾⁽¹⁴⁾

11/16" ⁽⁵⁾

1 3/4"

Index

.055"

.160"

1 1/8"

1 3/32"

7023066

480-500

..........

11/16" ⁽⁵⁾

1 3/4"

Index

.055"

.160"

1 1/8"

1 3/32"

7023071

480-500 ⁽³⁾

..........

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.160"

1 11/32"

1 9/32"

7023086

375

425 ⁽²⁾

5/8" ⁽⁵⁾

1 29/32"

Index

.050"

.160"

1 11/32"

..........

7023096

375

425 ⁽²⁾

5/8" ⁽⁵⁾

1 29/32"

Index

.050"

.160"

1 11/32"

...........

7023142

..........

500 ⁽²⁾⁽¹⁸⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.052"

.157"

1 3/32"

..........

7023145

..........

525 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.095"

.260"

1 7/16"

........

7023146

575 ⁽¹²⁾

575 ⁽¹¹⁾⁽¹²⁾

21/32" ⁽⁵⁾

1 29/32"

Index

.095"

.260"

1 7/16"

..........

7024046

..........

500 ⁽²⁾⁽¹⁸⁾

1/2" ⁽⁵⁾

1 29/32"

2 Rich

.040"

.085"

1 11/32"

..........

7024047

500 ⁽¹⁸⁾

..........

1/2" ⁽⁵⁾

1 29/32"

Index

.040"

.085"

1 11/32"

..........

7024052

..........

500 ⁽²⁾

19/32" ⁽⁵⁾

1 13/16"

Index

.150"

.160"

1 7/16"

1 11/32"

7024053

..........

500 ⁽²⁾

7/16" ⁽⁵⁾

1 13/16"

Index

.150"

.160"

1 7/16"

1 11/32"

7024056

600

..........

11/16" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.250"

1 3/32"

7024057

600

..........

17/32" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.250"

1 3/32"

7024058

500

500 ⁽²⁾

11/16" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.250"

1 3/32"

7024059

500

500 ⁽²⁾

17/32" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.250"

1 3/32"

7024062

..........

480-500⁽²⁾⁽³⁾

5/8" ⁽⁵⁾

1 3/4"

Index

.080"

.160"

1 21/64"

1 17/64"

7024100

..........

500 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.070"

.200"

1 1/8"

7024101

500

..........

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7024102

500

500 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.070"

.200"

1 1/8"

7024106

..........

500 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.070"

.200"

1 1/8"

7024108

500

500 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.070"

.200"

1 1/8"

7024110

..........

⁽²⁰⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7024112

..........

450-500 ⁽²⁰⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7024155

600

..........

11/16" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.260"

1 3/32"

7024156

..........

500⁽²⁾⁽¹⁸⁾

11/16" ⁽⁵⁾

1 13/16"

1 Lean

.080"

.260"

1 3/32"

7024183

475

475 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7024186

475

475 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7025046

..........

550 ⁽²⁾⁽²¹⁾

19/32" ⁽⁵⁾

1 29/32"

Index

.055"

.140"

1 5/32"

...........

7025047

550 ⁽²¹⁾

..........

19/32" ⁽⁵⁾

1 29/32"

Index

.055"

.140"

1 5/32"

.........

7025052

..........

500 ⁽²⁾

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025053

600 ⁽¹⁴⁾

600 ⁽²⁾⁽¹⁴⁾

19/32" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025056

..........

500 ⁽²⁾

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025057

..........

600 ⁽²⁾⁽¹⁴⁾

19/32" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025058

550

..........

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025060

..........

480-500 ⁽²⁾

19/32" ⁽⁵⁾

1 3/4"

Index

.085"

.160"

1 11/32"

1 9/32"

7025061

640-660 ⁽¹⁴⁾

540-560 ⁽²⁾⁽¹⁴⁾

19/32" ⁽⁵⁾

1 3/4"

Index

.085"

.160"

1 11/32"

1 9/32"

7025062

..........

480-500 ⁽²⁾

19/32" ⁽⁵⁾

1 3/4"

Index

.085"

160"

1 11/32"

1 9/32"

7025066

580-600

..........

19/32" ⁽⁵⁾

1 3/4"

Index

.085"

.160"

1 11/32"

1 9/32"

7025071

580-600

..........

19/32" ⁽⁵⁾

1 3/4"

Index

.085"

.160"

1 11/32"

1 9/32"

7025088

500

500 ⁽²⁾

3/4" ⁽⁵⁾

1 3/4"

Index

.060"

.200"

1 1/8"

7025089

450-475

.....

3/4" ⁽⁵⁾

1 29/32"

.....

1 1/8"

.....

7025103

450-500

..........

3/4" ⁽⁵⁾

1 3/4"

⁽¹⁹⁾

.060"

.200"

1 1/8"

7025152

550

..........

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025156

..........

550⁽²⁾⁽¹⁴⁾

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

7025159

600 ⁽¹⁴⁾

..........

3/4" ⁽⁵⁾

1 7/8"

Index

.150"

.160"

1 7/16"

1 11/32"

⁽¹⁾	See procedure below.

⁽²⁾	Automatic transmission in "D" (Drive).

(3) - On Air Conditioned cars, set speed at 500-520 RPM in "Drive" with Air Conditioning "OFF".

⁽³⁾	540-560 RPM on Air Conditioned cars with Air Conditioner turned "OFF".

⁽⁴⁾	"Vertical Seam" type.

⁽⁵⁾	"Horizontal Seam" type.

⁽⁶⁾	.143-.163" permissible.

⁽⁷⁾	On early carburetors (not stamped "M8" on brass tag) increase setting 1/16". See " Pump Rod Setting Caution " below.

⁽⁸⁾	Setting for late carburetors marked by letters "A", "B", or "C" on identification tag. For early carburetors (with no letter or with "MOD" notation on brass tag), set ***1 Notch Rich.

⁽⁹⁾	11/16" (Early Carbs. with "A" or no letter on tag), 1/2" (Later Carbs. with "B" or later on tag).

⁽¹⁰⁾	1 29/32" (Early Carbs. with "A" or no letter on tag), 1 13/16" (Later Carbs. with "B" or later on tag).

⁽¹¹⁾	Automatic Transmission in "N" or "P".

⁽¹²⁾	575 RPM on Air Conditioned Cars.

⁽¹³⁾	575 RPM on Air Conditioned Cars.

⁽¹⁴⁾	With Air Conditioning OFF.

⁽¹⁵⁾	With Air Conditioning OFF (Carburetors with Idle Compensator), ON (Carburetors without Compensator).

⁽¹⁶⁾	1/2" (Early Carburetors with "A" or no letter on tag). 13/32" (Later Carburetors with "B" or later on tag).

⁽¹⁷⁾	525 RPM on Air Conditioned cars with Air Conditioner "OFF".

⁽¹⁸⁾	550 RPM on Air Conditioned cars with Air Conditioner "OFF".

⁽¹⁹⁾	See text for adjustment procedure.

⁽²⁰⁾	Set idle speed as low as possible to obtain smooth idle and prevent creep in Drive or harsh shifts during transmission operation.

⁽²¹⁾	600 RPM Air Conditioned Cars (Air Conditioner OFF).

1966 CARBURETOR ADJUSTMENT SPECIFICATIONS

Rochester Carb. No.

⁽¹⁾ Hot Idle Speed (Engine RPM) ⁽²⁾

Float Level Setting

Float Drop Setting

Pump Rod Setting

Idle Vent Setting

Choke Rod Setting

Unloader Setting

Auto. Choke Setting

Synchro-mesh

Auto. Trans.

7024101

⁽⁷⁾

.....

3/4" ⁽¹¹⁾

1 3/4" ⁽¹²⁾

1 1/8" ⁽¹³⁾

1" ⁽¹⁴⁾

.060"

.215" ⁽¹⁶⁾

⁽⁶⁾

7024110

.....

⁽⁸⁾

3/4" ⁽¹¹⁾

1 3/4" ⁽¹²⁾

1 1/8" ⁽¹³⁾

1" ⁽¹⁴⁾

.060"

.215" ⁽¹⁶⁾

⁽⁶⁾

7024112

.....

450-500 ⁽⁵⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7024183

550

3/4"

1 3/4"

1 1/8"

.060"

.200"

⁽⁶⁾

7024186

550

3/4"

1 3/4"

1 1/8"

.060"

.200"

⁽⁶⁾

7025088

525

500-520

1 23/64"

1 29/32"

57/64"

49/64"

.060"

.200"

⁽⁶⁾

7025103

450-500

.....

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7026046

..........

550 ⁽³⁾

1/2"

1 27/32"

1 5/32" ⁽⁹⁾

..........

.055"

.140"

Index

7026047

550 ⁽⁴⁾

.....

1/2"

1 27/32"

1 11/32" ⁽¹⁰⁾

.....

.055"

140"

Index

7026052

......

500

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7026053

575 ⁽⁴⁾

19/32"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7026054

550

.....

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

1 Lean

7026058

600

500

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7026059

600 ⁽⁴⁾

575 ⁽⁴⁾

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7026060

......

500

19/32"

1 3/4"

1 21/64"

......

.085"

.160"

Index

7026061

......

575 ⁽⁴⁾

19/32"

1 3/4"

1 21/64"

......

.085"

.160"

Index

7026062

......

⁽¹⁵⁾

19/32"

1 3/4"

1 21/64"

1 9/32"

.085"

, 160"

Index

7026066

600

......

19/32"

1 3/4"

1 21/64"

.......

.085"

.160"

Index

7026071

⁽¹⁷⁾

......

19/32"

1 3/4"

1 21/64"

1 9/32"

.085"

.160"

Index

7026144

......

550 ⁽³⁾

1/2"

1 27/32"

1 11/32"⁽¹⁰⁾

......

.055"

.140"

Index

7026145

550 ⁽³⁾

......

1/2"

1 27/32"

1 5/32" ⁽⁹⁾

......

.055"

.140"

Index

7026146

......

550 ⁽³⁾

15/32"

1 3/4"

1 5/32" ⁽⁹⁾

......

.055"

.140"

Index

7026147

550 ⁽³⁾

......

15/32"

1 3/4"

1 11/32"⁽¹⁰⁾

......

.055"

.140"

Index

7036046

......

600 ⁽⁴⁾

1/2"

1 27/32"

1 5/32"⁽⁹⁾

......

.055"

.140"

Index

7036048

......

600 ⁽⁴⁾

1/2"

1 27/32"

1 5/32"⁽⁹⁾

......

.055"

.140"

Index

7036052

......

500

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7036053

575 ⁽⁴⁾

19/32"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7036058

600

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7036060

......

600

19/32"

1 3/4"

1 21/64"

......

.085"

.160"

Index

7036061

......

600 ⁽⁴⁾

19/32"

1 3/4"

1 21/64"

......

.085"

.160"

Index

7036062

......

600 ⁽⁴⁾

19/32"

1 3/4"

1 21/64"

1 9/32"

.085"

.160"

Index

7036071

700 ⁽⁴⁾

......

19/32"

1 3/4"

1 21/64"

1 9/32"

.085"

.160"

Index

7036101

700

......

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7036103

700 ⁽⁴⁾

......

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7036110

......

600 ⁽⁴⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7036112

......

600 ⁽⁴⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7036144

......

600 ⁽⁴⁾

1/2"

1 27/32"

1 1/16" ⁽⁹⁾

......

.055"

.140"

Index

7036146

......

600 ⁽⁴⁾

15/32"

1 3/4"

1 5/32" ⁽⁹⁾

......

.055"

.140"

Index

7036159

600 ⁽⁴⁾

3/4"

1 7/8"

1 7/16"

1 11/32"

.150"

.160"

Index

7036248

......

600 ⁽⁴⁾

15/32"

1 3/4"

1 5/32" ⁽⁹⁾

......

.055"

.140"

Index

⁽¹⁾	Air conditioner ON (except as noted).

⁽²⁾	Transmission selector lever in "D". Air conditioner ON (except as noted).

⁽³⁾	Increase idle speed 50 RPM on Air Conditioned cars with air conditioner OFF.

⁽⁴⁾	Air conditioner OFF (when equipped).

⁽⁵⁾	Set as low as possible for smooth idling to prevent creep in Drive and harsh shifts in service.

⁽⁶⁾	See text for adjustment procedure.

⁽⁷⁾	Chevrolet 450-500 RPM. Studebaker 525 RPM.

⁽⁸⁾	Chevrolet 450-500 RPM. Set as low as possible for smooth idling to prevent creep in Drive and harsh shifts in service. Studebaker 500-520 RPM.

⁽⁹⁾	Pump rod in INNER hole of pump lever.

⁽¹⁰⁾	Pump rod in OUTER hole of pump lever.

⁽¹¹⁾	Chevrolet only. Studebaker 1 23/64".

⁽¹²⁾	Chevrolet only. Studebaker 1 29/32".

⁽¹³⁾	Chevrolet only. Studebaker 57/64".

⁽¹⁴⁾	Chevrolet only. Studebaker 49/64".

⁽¹⁵⁾	500 RPM (Without Air Cond.), 575 RPM (Air Cond. cars with Air Conditioner OFF).

⁽¹⁶⁾	Chevrolet only. Studebaker.200".

⁽¹⁷⁾	600 RPM (Without Air Cond.), 700 RPM (Air Cond. cars with air conditioner OFF).

1967 CARBURETOR ADJUSTMENT SPECIFICATIONS

Rochester Carb. No.

⁽¹⁾ Hot Idle Speed (Engine RPM) ⁽²⁾

Float Level Setting

Float Drop Setting

Pump Rod Setting

Idle Vent Setting

Choke Rod Setting

Unloader Setting

Auto. Choke Setting

Synchro-mesh

Auto. Trans.

7024186

450-500

3/4"

1 3/4"

1 1/8"

.060"

.200"

⁽⁶⁾

7025089

450-500

3/4"

1 29/32"

1 1/8"

.....

None

7027033

550

500

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7027035

600

500

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7027040

..........

550 ⁽³⁾

1/2"

1 9/32"

1 1/16" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027041

..........

600 ⁽⁴⁾

1/2"

1 9/32"

1 1/16" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027042

550 ⁽³⁾

..........

1/2"

1 9/32"

1 5/32" ⁽¹⁰⁾

31/32"

.055"

.140"

Index

7027044

..........

550 ⁽³⁾

15/32"

1 9/16"

1 5/32" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027045

..........

600 ⁽⁴⁾

15/32"

1 9/16"

1 5/32" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027046

550 ⁽³⁾

..........

15/32"

1 9/16"

1 5/32" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027049

..........

600 ⁽⁴⁾

15/32"

1 9/16"

1 5/32" ⁽⁹⁾

31/32"

.055"

.140"

Index

7027060

..........

500

9/16"

1 9/16"

1 11/32"

......

.085"

.160"

Index

7027061

..........

600 ⁽⁴⁾

9/16"

1 9/16"

1 11/32"

......

.085"

.160"

Index

7027062

..........

500 ⁽⁸⁾

9/16"

1 9/16"

1 11/32"

1 9/32"

.085"

.160"

Index

7027066

600 ⁽⁷⁾

..........

9/16"

1 9/16"

1 11/32"

.......

.085"

.160"

Index

7027071

600 ⁽⁷⁾

..........

9/16"

1 9/16"

1 11/32"

1 9/32"

.085"

.160"

Index

7027101

500

..........

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7027103

500

..........

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7027110

..........

⁽⁵⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7027112

..........

⁽⁵⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7027133

600 ⁽⁴⁾

575 ⁽⁴⁾

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7027136

575 ⁽⁴⁾⁽¹¹⁾

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7027139

600 ⁽⁶⁾

1/2"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7027238

600 ⁽⁶⁾

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037034

..........

550 ⁽³⁾

15/32"

1 9/16"

1 5/32" ⁽⁹⁾

31/32"

.055"

.140"

Index

7037050

600 ⁽⁴⁾

575 ⁽⁴⁾

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037051

650 ⁽⁴⁾

600 ⁽⁴⁾

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037052

600

500

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037053

650

600

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037054

..........

500

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037055

600

500

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037056

575 ⁽⁴⁾⁽¹¹⁾

1/2"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037057

600 ⁽⁴⁾⁽¹¹⁾

575 ⁽⁴⁾⁽¹¹⁾

1/2"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

Index

7037058

550

..........

19/32"

1 9/16"

1 7/16"

1 5/16"

.150"

.160"

1 Lean

7037061

..........

600 ⁽⁴⁾

9/16"

1 9/16"

1 11/32"

1 5/16"

.085"

.160"

Index

7037062

..........

600 ⁽⁴⁾

9/16"

1 9/16"

1 11/32"

1 5/16"

.085"

.160"

Index

7037066

700 ⁽⁴⁾

..........

9/16"

1 9/16"

1 11/32"

1 5/16"

.085"

.160"

Index

7037071

700 ⁽⁴⁾

..........

9/16"

1 9/16"

1 11/32"

1 5/16"

.085"

.160"

Index

7037101

700 ⁽⁴⁾

..........

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7037103

700 ⁽⁴⁾

..........

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7037110

..........

600 ⁽⁴⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7037112

..........

600 ⁽⁴⁾

3/4"

1 3/4"

1 1/8"

.060"

.215"

⁽⁶⁾

7037162

..........

600 ⁽⁴⁾

9/16"

1 9/16"

1 11/32"

1 9/32"

.085"

.160"

Index

⁽¹⁾	Air Conditioner ON (except as noted).

⁽²⁾	Transmission selector lever in Drive and Air Conditioner ON (except as noted).

⁽³⁾	On Air Conditioned Cars, increase idle speed 50 RPM with Air Conditioner OFF.

⁽⁴⁾	Air Conditioner OFF.

⁽⁵⁾	500 RPM (283" V8V 600 RPM (327" V8)

⁽⁶⁾	See text for adjustment procedure.

⁽⁷⁾	700 RPM on Air Cond. Cars (Air Cond. OFF).

⁽⁸⁾	600 RPM on Air Cond. Cars (Air Cond. OFF).

⁽⁹⁾	Pump rod in inner hole of pump lever.

⁽¹⁰⁾	Pump rod in outer hole of pump lever.

⁽¹¹⁾	500 RPM on cars with Comfortron Air Conditioner with Comfortron ON.

OLDSMOBILE NOTE - When making idle adjustment, transmission stator must be in high angle position. On cars with automatic level control, compressor must not be operating.