Adjustment Screws and functions Idle mixture screw: controlsthe intake of fuel to adjust the engine for optimum running.TAS screw: controlsthe intake of air to adjust the engine’s idle speed.High speed screw: (marked H on carb) - This is the adjustment that controls the proportion of fuel in the combustible air/fuel mixture at cutting speed.Idle speed screw:...

If you're dealing with a carburetor that's dumping fuel everywhere, you're in for a frustrating and potentially dangerous situation. But don't worry, we're here to help you understand the inner workings of your carburetor and how to resolve this common issue. In this guide, we'll focus on the role of the float and needle...