Invention on Instagram: "Before electric starters, many tractors were designed to be started entirely by hand. A steel rod or crank was inserted into the front of the engine where it engaged the crankshaft. Turning it by hand rotated the engine internals just enough to draw in fuel and air and allow ignition to occur. If the timing and mixture were set correctly, the engine could fire after only a few turns. Once a cylinder ignited, the engine would continue running on its own and the crank woul