Carter Brass Bowl Carburetor
Nash 6cyl 1930-1931
Carburetors 147S, 147SA
Flange Size: 1 1/8", Main venturi 1 1/32" ID
Upper Well: Depth from stand pipe seat, 1/4"
Lower Well: 7/16" 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. 48 hole in needle seat.
Gas Line Connection: 1/4"
Low Speed Jet Tube: Jet, No. 66 drill, Bypass No. 56 drill, Economizer, No. 55 drill.
Idle Port: Length .176", Width: .040". Opening above valve with valve closed tight: .048" to .052"
By Pass: under idle port No. 55 drill.
Set Idle Adjustment Screw: 1/2 to 1 turn open. For richer mixture, turn screw in. Do not idle engine below 300 RPM when adjusting screw.
Main Sell Jet No. 56 drill.
Multiple Jet Nozzle: Vertical jet, No. 48 drill. Top I.D. No. 26 drill size.
Accelerating Jets (Combination No. 82):