How to Adjust the Carburetor Needle for Fuel Saving?

[EvelynLynn]

Carburetor adjustment methods are as follows: 1. The fuel level in the float chamber should be relatively lowered. Fuel in the float chamber enters the carburetor throat through the main jet and mixes with air to form a combustible mixture. Moderately lowering the liquid level is to reduce the pressure difference. 2. There are two types of main jets: fixed and adjustable with a needle. For fixed main jets, you can wrap one or two thinner copper wires inside the jet to reduce fuel flow. For adjustable types, first screw the needle all the way in, then turn it counterclockwise about one and a half turns. Reasonably lower the mixture concentration to ensure stable engine operation. The car should not experience jerking or carburetor backfire during acceleration. Multiple adjustments may be needed to reach an optimal level. 3. Generally, try not to press the throttle all the way down to achieve fuel-saving purposes. The throttle opening within two-thirds is the leanest and most fuel-efficient state for the mixture. 4. Adjusting the screw on the right side of the carburetor can lower the idle speed to save fuel.