• Rochester 2G Exploded Views and Exterior Images

    • 06/29/2022
    • Gabrielle Mersereau

    These images are for reference purposes only, keep in mind there are many versions of the Rochester 2 jet carburetor and they will vary from application to application.

  • Rich on Throttle in Carter 1-barrel Carbs

    • 06/23/2022
    • Gabrielle Mersereau

    Complaint: Runs rich under throttle in Carter W1, WA-1, WO, WDO 1-barrel carbs Possible cause: High fuel pump pressure High float level Warped or bent bowl cover allowing air leak at the gasket Metering rod spring disconnected from metering rod Metering rod not gauged properly Worn metering rod and jet…

  • Lean on Throttle in Carter 1-barrel Carbs

    • Gabrielle Mersereau

    Complaint: Lean at high speed (part to wide open throttle) in Carter W1, WA-1, WO, WDO 1-barrel carbs Possible cause: Low fuel pump pressure Restriction in gas line connection to needle seat. This does not allow sufficent gasoline to enter bowl for high speed driving Low float level Opening in…

  • Rich on Idle, Carter 1-barrel carbs

    • Gabrielle Mersereau

    Complaint: Rich on idle in Carter W1, WA-1, WO, WDO 1-barrel carbs Possible cause: Head of low speed jet unsoldered Worn or too large metering hole in low speed jet Upper end of low speed jet not sealed in casting Air bleed or bypass hole in casting restricted with carbon…

  • Lean on Idle, Carter 1-barrels

    • Gabrielle Mersereau

    Complaint: Lean on idle in Carter W1, WA-1, WO, WDO 1-barrel carbs Possible cause: Restricted metering hole in low speed jet. Replace if possible. Air by-pass or bleed holes in casting oversize. Restriction in passage in casting from low speed jet to port hole and idle screw. Economizer hole in…

  • Flooding or Leaking in Carter 1-barrel Carburetors

    • Gabrielle Mersereau

    Complaint: Flooding or leaking in the Carter W1, WA-1, WO, and WDO carburetors Possible Causes: High fuel pump pressure. Test your fuel pump, most 1-barrels require 3.5-4psi. If your pressure is too high, add an inline pressure regulator and dial it back. Leaking gas line, or connections. Connections could be…

  • Carter RBS Idle Solenoid

    • 06/22/2022
    • Gabrielle Mersereau

    Many carbruetor models use an idle solenoid to prevent “dieseling” or “after-run”. Many things that have been done to lower emissions have enhanced the possibility of dieseling. Higher idle speeds, leaner air-fuel mixtures, retarded ignition timing, higher operating temperature, all contribute to dieseling. When the ignition is turned on, the…

  • RBS Dashpot

    • Gabrielle Mersereau

    Some applications use a slow closing throttle device known as a dashpot. They are used to delay or slow the throttle closing the last few degrees to prevent engine stalling at the lower speeds and to eliminate a sudden peak of hydrocarbon emissions on sudden deceleration. At idle, the manifold…

  • RBS Choke Circuit

    • Gabrielle Mersereau

    The automatic choke provides the correct mixture necessary for quick cold engine starting and proper warm-up performance. When the engine is cold, tension of the thermostatic coil pulls the choke valve to the closed position. As the engine is cracked, air pressure against the offset portion of the choke valve…

  • Pump Circuit (Carter RBS)

    • Gabrielle Mersereau

    The accelerating pump circuit provides the measured amount of fuel necessary to assure smooth engine performance during acceleration at lower car speeds. As the throttle is closed, the accelerating pump plunger is raised in the cylinder and fuel from the bowl flows into the pump cylinder through the intake ball…

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