This 2-stroke gasoline hand crank engine model stands 14" tall and demonstrates the basic operating stages of an air-cooled 2-stroke motor. Turning the hand crank actuates the crankshaft, piston, throttle valve, and float so students can follow each stage of the firing cycle. An ignition light activates on the compression stroke when powered by two AA batteries (not included), visually highlighting ignition timing. The model is constructed from cast alloys and ABS plastic for durability through repeated classroom demonstrations. Ideal for automotive students and enthusiasts.