How do you adjust a farmall h carburetor?

To adjust the carburetor on a Farmall H, start by ensuring the engine is at operating temperature. First, adjust the idle mixture screw by turning it in until the engine starts to stumble, then back it out until you achieve the smoothest idle. Next, set the idle speed screw to achieve a steady idle around 500 RPM. Finally, if necessary, adjust the main mixture screw for optimal performance under load, ensuring the engine runs smoothly without hesitation.