Most vintage tractor models relied on basic gravity-fed fuel systems that eliminated the need for mechanical fuel pumps. Mounted directly above the engine block, the fuel tank delivered gasoline or kerosene smoothly straight down into the updraft carburetor. A simple glass sediment bowl filtered water and debris, allowing farmers to quickly clean fuel lines. https://ulvixo.com/used-tractor-inspection-guide-red-flags-engine-health-and-pricing/