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What Are Carburetor Jets

Posted by Mike on 2/2/2020 to Carburetor Tips
In simple terms, jets are small threaded plugs with a tiny metering orifice throughout its center that control the amount of fuel entering to carburetor’s venturi. They are considered delicate metering components usually made from brass. The diameter of the main jet metering orifice determines the fuel flowrate, hence the slightest difference could alter the air-fuel ratio. Although carburetors’ jet comes out-of-the-box pre-calibrated for normal conditions, it can be replaced if necessary with another jet sporting a different diameter.

What Causes Carburetor Flooding

Posted by Mike on 1/14/2020 to Rochester B
What Causes Carburetor Flooding
There are several things that can cause flooding. I will address each.

The 1st thing most people want to do when their carb is flooding is change the float setting. Unless the float is hugely off, that isn't the problem. At least as far as the setting goes. Set your float to specifications and leave it there. Fudging the float setting is covering up the real problem.

Carburetor Hesitation Upon Acceleration

Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine

Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. This test is best done with the carburetor off of the car. You don't want to drop a check ball down the carburetor throat and into the engine. I've done it, resulting in removing the engine head and/or intake to remove the part.


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