A 2 Stroke Brush Cutter Engine is a type of internal combustion engine which completes a power cycle with two strokes of the piston during only one crankshaft revolution.The two main functions of a two-stroke engine are compression and combustion, 2 stroke engines tend to be more powerful than 4 stroke engines. And since they have less moving parts, 2 stroke engines tend to be more reliable. http://www.xzylathe.com/