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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.
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