How to Restring a String Trimmer Changing weed eater string requires very few tools and doesn’t take long if you follow the steps below.

The trimmer string wraps around a spool that sits inside the rotating head. There are two methods to refill it—replace the whole spool, or rethread a new length of string.

Next, place the spool back into your weed eater, taking one string out of its notch at a time (or releasing each with your fingers) and feeding it through a hole.

Nothing is as frustrating, however, when your weed eater string breaks and needs replacing, leaving many wondering what to do and how to change it.

Plus, if you have a trimmer with a proprietary spool you need to hope the company never goes out of business. Or, you can simply refill your string spool with this handy tool.