Carburetor Specifications

 

 

 

Carburetor
Model

Carter - YF Rochester B
153 -PG 153 - SYN 230 Economy 230 (P 20 - 30) 230 292
3793019 (3402S) 3792945 (3379S) 7023021 7023011 7023017 7024009
Float Level 7/16" w/o gasket @ free end 1 9/32"
Float Drop 1 3/16" w/o gasket @ free end 1 3/4"
Idle Vent 0.025" - 0.030" @ Idle Position
Engine Stopped & Choke Open
0.050" @ Idle Position
Engine Stopped & Choke Open
Bowl Vent 1 Internal - 1 External Idle 3 Internal - 1 External Idle 2 Internal - 1 External Idle
Main Metering Jet 0.096" --- 0.072"
Metering Rod Sizes 0.071"
0.052"
0.070"
0.052"
--- --- --- ---
Throttle Bore 1 11/16" 1 9/16" 1 3/4"
Main Venturi 1 5/16" 1 1/16" 1 19/32" 1 5/8"
Small Venturi --- --- 19/32"
Pump Discharge Jet 0.0225" 0.031" 0.035"
Idle Speed Jet 0.026" 0.057" 0.067"

 

Carburetor
Model

Rochester 2G

Rochester 4G   Rochester 4G  
283 283 w/ Gov. 327 348 348   409  
7023010 7023009 7020109 7015019 7020025 7020029
Primary Secondary Primary Secondary
Float Level

1 23/64"

1 5/8" 1 11/16" 1 5/8" 1 11/16"
Float Drop 1 29/32" 2 1/4"

Pump Rod

57/64" 1 1/16" --- 1 1/16" ---
Bowl Vent 1 - Inside 2 - Inside
Main Metering Jet 0.054" 0.053" 0.054" 0.055" 0.069" 0.054" 0.067"
Throttle Bore  1 7/16" 1 7/16"
Main Venturi 1 3/32" 1/1/8" 1 1/4" 1 1/8" 1 1/4"
Small Venturi 1/8" 1/4"
Pump Discharge Jet 0.026" 0.026" --- 0.026" ---
Idle Tube 0.028"   0.031" 0.037" 0.027" 0.040" 0.028" 0.040"

 

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