Weed trimmers use a monofilament line that is attached to a rotating head to cut grass and weeds. As the rotating head turns, the line becomes taut and rigid. Weed trimmers are designed for light-duty cutting, such as lawn maintenance, but should not be used for trimming shrubbery or other woody plants.
Place the weed trimmer on the flat ground with the cutting head pointed downward to start the engine of the device. Pull the rope starter on the engine to start the weed trimmer.
Grasp the shaft along the grip and throttle trigger with one hand and the assist handle with the other hand.
Hold the weed trimmer's cutting head in front of you and parallel to the ground. Avoid pressing the mower to the ground to prevent scalping your lawn. Position the cutting head at a desired height to trim your grass.
Engage the weed trimmer's cutting head by pressing down on the throttle. Sweep the cutting head in a fan pattern over a 90-degree angle in front of you to cut the grass. Walk slowly over the grass in a pattern to cut the grass uniformly.
Edge your grass by turning the cutting head in a path perpendicular to the ground. Run the head along the edge of the grass to cut it along a fine edge.