How to Adjust Idle Screws?

Answer The idle screw controls the mixture of air and fuel entering an engine. Cars, trucks, motorcycles, lawnmowers and small powered appliances, such as weed eaters and power blowers, all have idle scre... Read More »

Top Q&A For: How to Adjust Idle Screws

How to Adjust the Idle Screws on a Carburetor?

Your motorcycle relies on a proper mixture of air and fuel to power its motor. This mixture is governed by the carburetor, which pulls air into a channel called a venturi and mixes with gas before ... Read More »

How to Adjust Idle Mixture Screws?

The idle-mixture screws in a vehicle's carburetor determines how much air is mixed with the fuel being drawn through the carburetor while the engine is idling. If the idle-mixture screws are improp... Read More »

How to Adjust Idle Screws on a Quadrajet Carb?

The idle screws on a Rochester Quadrajet carburetor fine tune the air-fuel ratio going into the engine during idle. The most common cause of rough idle quality in engines equipped with this carbure... Read More »

How to Set Idle Mixture Screws on a Holley 4150 Carburetor?

The Holley 4150 carburetor is a four-barrel carburetor designed specifically for high-performance engines. The carburetor is known as a "four-corner" carburetor because it features a single air/fue... Read More »