How to String a Weed Eater

Replacing the string on your weed eater isn’t nearly as difficult as you might think. Although there is a definite market for folks who would rather just buy the spools of pre-wound string, there are those of us who enjoy the satisfaction of doing something ourselves. (It’s great to save some money too!)

So for those of you who want to learn how to replace the string in your weed eater, we’ve outlined the complete process right here. Whether you have a single line or double line trimmer, you should be able to replace the string by following these directions.

  • Getting ready

Having all the necessary supplies is critical to the success of any project but it’s especially true when you’re replacing the string on your weed trimmer.

string trimmer line

The most important first step is to buy the proper size or width of string. If the line is too large, the trimmer won’t work, so this is not something that you want to “guess-timate.” Check the manual or the company website to make sure that you know the correct string size.

It’s a good idea to pre-cut the line or string. The spools for most weed eaters can accommodate from 10 to 25 feet of line. If you’re not sure how much line your particular weed eater can hold, cut the line to a full 25 feet. If that’s too much for the spool, you can always cut the remaining string to a size that fits.

  • Removing the spool

This first step is the most important part of this process - it’s the part about safety. Always remember that you are dealing with a tool that can do some serious damage if it’s not handled carefully.

Before you proceed any further, make sure the weed eater is turned off. If the trimmer is gas-powered, ensure that the engine is completely turned off and that the components are cool to the touch. If your weed eater is electric, be sure to unplug it. If it’s battery-powered, remove the battery.

removing pool

The next stage is to remove the spool from the trimmer head. Because there are multiple mechanisms for keeping a string spool in place, removing it might involve depressing a couple of tabs to remove the spool cap or perhaps unscrewing it.

Although it should be simple to remove the spool, if you have problems, consult with the manufacturer’s website or the manual.

  • Stringing it up

Take a careful look at the spool and locate the small hole in the center core. Insert the end of the string in this hole and begin to wrap the string in the direction indicated by the arrows.

line weed eater

This is where attention to detail will help you do the job properly. When you are wrapping the line, try to wrap it in concentric rows of string, laying the new wrap of string directly next to the previous one. Laying out the string in neat rows like this will help keep the string from jamming when the tool is in use.

Continue to wrap the line around the spool until it’s completely filled or until only 5 or 6 inches remain. Fasten the line through the retainer on the spool.

  • Replacing the spool

Before returning the spool to the trimmer head, make certain to align the retainer—which is currently holding the loose end of the string—with the outside slot on the trimmer head.

put spool into head

Put the spool into the trimmer head, and then take the line out of the retainer that’s been holding it in place. Thread the string through the slot in the trimmer head, and give it a small tug to ensure the string isn’t caught.

Make certain that the string is also feeding smoothly through the trimmer head. Replace the cap on the trimmer head and you are ready to work!

  • Rewinding the spool on a double-line trimmer
Double line

Replacing two strings on a trimmer is nearly as easy as replacing one, so be sure you’re following the previous directions correctly. The only difference between the single-line and double-line trimmers is how the spool is wrapped and how the line comes through the trimmer head.

Just like with the single line, you’ll need to make sure the tool is turned off and cool to the touch as well as making sure you’re rewrapping the spool with the correct size of string. Check with the manufacturer if you’re not sure about the proper string size.

You’ll also want to pre-cut the string for a double-line spool, with the line length ranging from 10 to 25 feet.

  • Double the fun

The two-line spool looks remarkably like the single-line spool, with one exception—there’s a small plastic wall around the center of the spool. This tiny wall of plastic divides one set of string from the other.

Take the first length of line and insert it into one starter hole. Taking note of the arrows on spool, wind the line in the direction they are pointing making the same neat rows as before. When there are 5 to 6 inches of line remaining, fasten the end of the string in the retainer.

If for some reason you have a lot of line left over, just cut the string until 5 or 6 inches of line extends from the retainer. Once you’re completely done with the first line, repeat the entire process with the second line.

When the second line is completely wrapped and fastened in the retainer, the ends of both the first and the second lines should be extending from opposite sides.

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