An electric weed trimmer is designed for light-duty grass cutting. Electric trimmers rely on a monofilament line to trim grass and weeds. The line wraps around a spool in the rotating head of the trimmer. When the monofilament line has become worn, cut off the ends and pull fresh line from the spool. But if the line becomes tangled on the spool, you will have to re-spool it. Respooling a trimmer requires you to detach the spool and wrap the line around the spool again.
Unscrew the trimmer hub. To do this, grasp the trimmer firmly in one hand. Place your other hand over the trimmer hub and twist it in the direction opposite that the trimmer rotates it.
Pull the hub upward as soon as it unscrews from the trimmer head. Grasp the hub in one hand and the spool in the other to pull the spool off the hub. Gently pull your hands apart.
Unwind the monofilament line from your spool and detach it from the centrally-located notch.
Wipe the hub and spool clean of dust, dirt and grass residue with a clean cloth. Place the hub and spool on a flat surface for re-spooling.
Detangle your monofilament line and fold it double.
Place the center of the monofilament line in the spool's anchoring notch. Wind the doubled line around the spool in the direction that the arrows printed on the side of the spool indicate. Do not allow the line to cross as you wind it.
Slip each end of the line through the exit holes in the hub. Pull enough line through the exit holes to trim grass with. Press the spool onto the hub until it snaps in place.
Align the hub with the head and screw the hub back onto the trimmer.