A weed eater is a modern convenience that makes lawn care much easier. The weed eater has a small motor that turns a hub. The hub has a supply of nylon line that spins at high speeds and cuts weed and small plants. When more line is needed, you gently tap the weed eater head on the ground and the bump knob releases more line. When the supply of line runs out, the bump knob must be loosened to install a new spool of line.
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Unplug the cord if the weed eater is electric powered or ensure the motor is off if it is gas powered.
Turn the weed eater over to gain access to the bottom of the head and the bump knob.
Place the weed eater between your legs while you are in a standing position. Position the head so it is in front of you.
Hold the weed eater with one hand and grasp the bump knob with the other.
Press down on the bump knob while you turn it counterclockwise. The knob will disengage from the head, exposing the spool of nylon line.