Here's why:
* Four-stroke cycle: The four-stroke cycle consists of four distinct strokes: intake, compression, power, and exhaust.
* Crankshaft rotation: Each stroke is completed with a 180-degree rotation of the crankshaft.
* Complete cycle: Therefore, a complete four-stroke cycle requires 360 degrees of crankshaft rotation (180 degrees per stroke x 4 strokes).
Therefore, one stroke of a four-stroke engine corresponds to 180 degrees of crankshaft rotation.
