How to Replace the Weed Eater String

The string is an essential part of the weed trimmer. It’s the busiest and most used part. And because it comes into contact with surfaces every time you switch on and use the machine, it’s subject to wear and tear. 

When you own a weed eater, you need to prepare yourself to replace, reload or maintain this part. Notwithstanding the frequency, you’ll face a nightmarish experience and frequent interruption of workflow when you find yourself needing to replace the line often. 

The spool houses the string. Hard surfaces and dense vegetation can also diminish the reserve in the spool. However, you don’t have to spend lots of effort to reload the spool or string constantly to make things right. 

Weed eater string comes in different shapes and thicknesses, knowing how to wind or rewind its string is an all-important step that can save you from unnecessary frustrations. The following paragraphs respond to some of the most nagging queries regarding string replacement. Read on. 

How to Restring the Spool?

Not all models of weed eaters require you rewind the spool. Some come with a spool that has been already been rewound. Some spools require you to rewind two strings while some require a single string.

But how do you go about reloading the spool when the string reserve is diminished? 

First, you will need to pull the spool out from the cutter head. To do this, you need to either press the tabs or use a screw driver to open the ring holding the head. The length of the windings inside the spool rarely exceeds 25 feet and drops below 15 feet. After you buy a new line, cut lengths to within that range. If dump feed requires double strings, ensure you cut them to the same length.

The spool’s center has an opening. When the windings diminish, the hole becomes apparent. You may want to make use of this hole to hold the string during reloading. A dump feed that holds both strings often has a divider that separates two sections each of which has an opening. Wind each line at a time onto the double-string weed eater spool.

If you are wondering what direction you should wind the string, the spool usually indicates the direction. In any case that’s not obvious, we discuss this further in details in the following sections of the article. Stay tuned.

Meanwhile, wind the lines of the string side by side to form a layer around the spool. Go on. Build layers upon layers of lines onto the spool to ensure tautness. Repeat this procedure for the other spool in a double-string weed eater. Leave about 0.5 feet of unwound string when you finish.

On the spool’s margin, there’s a cut. Two-stringed weed trimmers have two of such cuts. These cuts hold the unwound string in position during spool replacement.

Return the spool back to its place in the cutter head. Free the 0.5-feet long unwound string from the cut(s) and then pass it through the exit holes on the cutter head. Repeat the same procedure for the other string if the you have a double-string weed cutter.

Use a screw driver to fix holding ring back into its position in the cutter head. Shake the holding ring until it fixes itself firmly in position.

How Often Do I Have to Replace the Weed Eater String?

It’s needless to replace the string or restring the spool constantly. If you choose the best weed eater string, you should reload the string and spool with less effort. Nothing can be more joyous than smooth and even trimming spool sessions. 

Yet, despite the right product, heavy weeds and hard turfs can speed up wear and tear. But it’s not just the density of the material you trim, string shape and friction between the weed eater surface and hard surfaces can accelerate wear and tear. Of all string types, the round string is the most long-lasting because of its high density. 

When you go out to shop, look for nylon-containing round string. However, reinforced versions of the nylon string are more durable than the basic versions. Importantly, pay attention to the welding properties. 

Does the string attach itself to the spool housing when the temperature rises beyond certain point, or is it able to resist overheating? The right choice of a string gives you the freedom to cut through weed along concrete pavements for as long as you can. Heat-resistant string doesn’t soften easily under high temperatures. While round string is long-lasting, it bulges out of the spool when temperatures rise considerably. 

On the other hand, subzero temperatures increase the line’s brittleness. Steer clear of trimming dense weeds or hard surfaces during winter, as the line is likely to break. Any string type other than the round string has a greater surface and does better at resisting excessive heat. Thicker line diameters than between 0.065-inches and 0.085-inches are more long-lasting and are more suitable for turfs with heavy weed infestation. Some lines can be as thick as 0.110- or 0.115-inches.

Which Way Should I Wind the Weed Eater String?

If you find that it’s not apparent to what direction you need to wind or rewind the line, fret not. At some point, everyone feels lost. The good news is, as anything else, the trimmer gives us signs. Let’s examine how to obtain the useful clues.

Examine the Spool

The housing is the first place you need to examine to get some clues. Usually, the trimmer manufacturer indicates the winding or rewinding direction. If the bump feed takes two strings, then wind both of them along the same direction. However, you may not find a broken arrow in the usual places as it often imprints itself on the bottom of the spool.

Run the Windings Opposite the Trimming Direction

You may look for the arrow direction and not find it. Fortunately, there are reliable places to find helpful clues: the cutting head. Examine its direction of rotation. Then, wind the line or both lines opposite that direction. In short, if the trimmer head revolves clockwise, wind the string anticlockwise, and vice versa. Else, the windings will unwind when the trimming head rotates.  Last thing: don’t forget to read the manual. It is rich in information that can save you from needless frustrations.


The windings of weed eater string are housed in a spool. While the windings diminish with use, dense weeds and hard surfaces accelerate the process. If your yard has heavy weed infestation, you will delight in string with line thicknesses exceeding 0.085-inches and .110-inches in extreme cases. Restringing can be a tedium if string runs out often. 

The key takeaway is to choose the right product, and you’ll have less problems. Even in the inevitable event that you need to replace the string, winding or rewinding directions aren’t obvious. That’s when it’s necessary to look for clues. And these clues you can find on the spool and cutting head. 

Once you figure out the direction of revolution of the cutting head, then wind the opposite direction. We hope you this article helps you solve these weed eater problems. 

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