• Removing Stuck Discharge Nozzles From the Holley 4000

    The Holley 4000 discharge nozzles which are illustrated as part #30 in the picture can over time get stuck and can easily break when removing. Here are a few tips on how to remove this part. Please note before doing this that you can distort or crack the bowl housing….

  • Pomono Swap Meet

    I recently visited one of my suppliers that is located in the Los Angeles, CA area. While in the area I discovered a large annual swap meet that was being held in Pomono, CA. Not one to miss a good swap meet, I decided to spend my Sunday at the…

  • >Carburetor Dashpot

    > The carburetor dashpot is used to cushion the closing of the throttle. It basically allows the automatic transmission and the engine to catch up to a sudden closing of the throttle. This particular carburetor part has not been produced for several years now and are often missing from a…

  • Holley 4000 Spark Control

    Holley 4000 Holley 4000 Instruction Sheets Holley 4000 Visual Instruction Manual Holley 4000 1955 Newsletter What Does The Spark Control ValveĀ Do? The spark control valve in the passage from the throttle bore provides an efficient degree of spark advance during periods of acceleration by momentarily providing a partially retarded spark….

  • >Purpose of the Carburetor

    >The carburetor delivers a combustible mixture of fuel and air to the intake manifold of the engine. It automatically controls the amount of fuel being mixed with the air to meet changing engine operation conditions, delivering a greater amount of fuel when high power output is required and less fuel…

  • >Rochester 4GC Carburetor Repair Tips

    > Correct Throttle Body Gasket Installing the wrong gasket on a 4GC throttle body can make the carburetor act like it has a vacuum leak. It might run ok at higher RPM, but it will not idle properly, if at all. Assuming your carburetor was running ok at one time,…

  • >Carburetor Problems?

    >Carburetor Is Flooding These are the most likely causes. The needle and seat is not closing. Most likely there is dirt causing it to stick open, but the needle could also be defective. The float level is incorrect. Gas is getting inside the float making it heavier than normal. Carburetor…

  • >Marine Carburetor Being Rebuilt

    > Here is an example of a marine carburetor that looked to be in great condition from the outside, but after removing the top, foreign material was found which was causing the carburetor to flood. Most marine carburetors are painted black from the factory. This cuts down on potential corrosion….