4-stroke brush cutter is a handheld or backpack-powered cutting machine used for clearing thick grass, weeds, bushes, and light woody vegetation. It is powered by a four-stroke (4T) internal combustion engine, which completes its power cycle in four piston strokes: intake, compression, combustion, and exhaust.
Key features and description
A typical 4-stroke brush cutter consists of:
Engine (4-stroke petrol engine): Runs on petrol only (no oil mixed with fuel). It has a separate oil reservoir for lubrication, similar to a car engine.
Shaft (straight or split): Transfers power from the engine to the cutting head.
Handle (bike or loop handle): Helps the operator control movement and balance.
Cutting head: Can be a nylon trimmer line for grass or a metal blade for thicker vegetation.
Harness/strap: Supports the weight for longer