What is a compact engine commonly used in equipment like lawn mowers and chainsaws?

The term "small engine" refers specifically to lightweight, compact engines that are commonly found in various outdoor power equipment, including lawn mowers, chainsaws, and other similar tools. These engines are designed to be portable and efficient, often using a two-stroke or four-stroke cycle to maximize power output while minimizing size and weight. This makes them ideal for handheld or easy-to-maneuver equipment where space and weight are critical factors.

The other engine types listed, such as heavy-duty engines and commercial engines, are more suited for larger machinery or vehicles that require more power and durability. Hybrid engines typically combine internal combustion with electric power, making them less relevant in the context of compact equipment where simplicity and lightweight design are prioritized.