Owning a string trimmer enables you to keep every nook and cranny of your yard perfectly trimmed. The long shaft allows you to reach places that would otherwise be inaccessible, such as under shrubs and picnic tables, between permanent structures that are tightly situated, and other areas where your mower is too large to go. The plastic parts of your string trimmer will eventually wear out. These include the spool, the bump feed mechanism, and the guard. If it's the spool that needs replacement, it's a fast and simple job.
Rest the string trimmer on a table or bench, making certain the engine is not hot.
Turn the top of the spool, located on the opposite end of the trimmer shaft as the engine, until the spool releases. If your machine has a cap on the head, unscrew the cap and remove the spool.
Clean out any debris inside the head either by tipping the unit over, or by spraying the head with air.
Using about 6 feet of the correct sized line, load the spool by winding the line in the direction indicated on the spool. Leave approximately 6 inches of line free, and feed this through the eyelets in the head.
Situate the new spool over the head and lower it into place, continuing to guide the line through the eyelets. Rotate the spool until it snaps into place. The spool will typically snap into place whether you turn it clockwise or counter-clockwise. If your spool is secured by a screw-on cap, replace the cap and hand-tighten it.