The ECHO 21.2 cc Gas 2-Stroke engine is a versatile and powerful engine commonly used in a variety of outdoor power equipment, such as string trimmers, leaf blowers, hedge trimmers, and chainsaws. Here are some key features and specifications of this engine: 1-Displacement: The engine has a displacement of 21.2 cubic centimeters (cc), which refers to the total volume of all the cylinders in the engine. This displacement size is suitable for a range of applications, from light-duty to heavy-duty tasks. 2-Stroke Design: It is a 2-stroke engine, meaning it completes a power cycle in two strokes of the piston (one upstroke and one downstroke). 2-stroke engines are known for their simplicity, lightweight design, and high power-to-weight ratio. 3-Gasoline Powered: The engine operates on gasoline fuel. Typically, a 2-stroke engine requires a mixture of gasoline and two-stroke engine oil for lubrication, although some models may have separate fuel and oil reservoirs.