How to Load String Into a Weed Eater Trimmer
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How to load weed eater string starts with turning the trimmer off and disconnect the battery or shut off the gas engine, open the trimmer head, remove the old spool, and wind fresh line onto the spool in the direction the arrows show. Then anchor the line in the spool, feed the two ends through the eyelets on the cover, and reassemble the head. Most spools take about 10 to 20 feet of line, but the owner’s manual for your model gives the exact length and gauge. The steps are the same for most gas and battery trimmers, with small differences between bump-feed, auto-feed and push-button heads.
Quick answer
- Disconnect power first. Remove the battery or fully shut off the gas engine before you touch the cutting head.
- Cut about 10 to 20 feet of line, depending on the size of your spool, and match the line gauge to the manual.
- Wind the line tightly in the direction shown by the arrows, anchor one end in the spool, and feed both ends through the eyelets.
- For bump-feed heads, run the trimmer and tap the head on the ground to release more line. Auto-feed heads advance when the trimmer is switched on.
Before you start: check your head type
Trimmer heads come in a few designs, and the loading steps change with the design. A bump-feed head releases line when you tap it on the ground while the motor runs. An auto-feed head releases line as the trimmer runs, using a spring or a centrifugal system. A button-feed head needs you to press a button while you pull the line out by hand. Some heads are fixed-line designs, which use cut lengths of line pushed into the head rather than a wound spool. Check which type you own before you buy line or start unwinding anything. The manual or the head’s markings usually say which design it is.
Also check the line gauge. The gauge is the diameter of the line. The head or the manual lists the range it accepts, and a line that is too thick can bind, while a line that is too thin can wear quickly. Use only the gauge your manual names.
What you need
- Replacement trimmer line in the gauge your head accepts.
- A pair of gloves for handling the blade guard and the head edges.
- Scissors or a knife to cut the line to length.
- A clean, flat work surface, and the owner’s manual for the head.
Some replacement heads and spools come with pre-cut line or a pre-wound spool, which means you skip the winding step. The Weed Warrior head in this group uses precut lengths of line for a push-in load. The TOSRWGLL line listing supplies 16-foot precut lengths of 0.095-inch line. Those listings describe their own loading method, so follow the instructions included with the product you buy.
Step by step: loading a spool-type head
These steps follow the general procedure in an editorial guide to trimmer line. Adjust them to your model’s manual where the two differ.
- Disconnect power. Remove the battery from a cordless trimmer, or unplug a corded model. For a gas trimmer, shut off the engine and let it cool before you touch the head. The head can move when the engine is restarted, so this step prevents injury.
- Measure the line. Cut about 10 to 20 feet, depending on your spool. A rough guide is arm span, which is about 5 feet, but the manual is the reliable source for your model.
- Open the head. Follow the arrows on the cap, or press the tabs, to remove the cap. Pull out the spool and keep any spring or washer that comes loose, because a missing spring can cause the head to fail.
- Remove the old line. Note where the old string was anchored and which way it wound. A photo of the spool before you unwind it helps you match the new line to the old layout.
- Anchor the new line. Insert one end of the line into the hole or notch in the spool. Speed-feed heads use a different method, where you thread the line through one eyelet and out the other so both sides are even.
- Wind the spool. Wind the line in the direction the arrows on the spool show. Keep the coils tight, neat and parallel. Leave about 4 to 6 inches of line loose at the end so you can thread the eyelets. If you are winding two lines, keep each line in its own channel so they do not cross.
- Thread the eyelets. Feed the loose ends through the eyelet holes on the outer cover, and then set the spool back into the housing. Speed-feed heads skip this step because the line passes through the eyelets as part of the load.
- Reassemble. Replace the spring if it came out, then snap or twist the cap on until it clicks into place. Tug the line ends to make sure they move freely.
- Release more line. For a bump-feed head, run the trimmer and tap the head lightly on the ground to release more line. For an auto-feed head, the line advances when the trimmer is switched on. For a button-feed head, press the button while you pull the line out by hand.
Checking the load before you cut
A correct load should let the line turn freely in the head with no rubbing against the cap. Run the trimmer briefly at idle and listen for a steady sound. A rattling sound or a line that does not come out usually means the spool is wound the wrong way, the line is caught on the cover, or the head is too tight. Stop the trimmer, disconnect power, and check the winding before you try again.
Check the line length after the first few uses. If the line runs short quickly, the head may be feeding too little line, or the line may be too short for the spool. If the line does not advance at all, check the spring, the eyelets and the direction of the winding. Replace worn parts before a failure in the field.
Common problems and fixes
- The line will not advance. Check that the line ends are free and that the spool is seated under its spring. A bump-feed head needs a firm tap on the ground while the motor runs.
- The line tangles inside the head. The winding is likely loose or crossed. Unwind the spool and wind it again in the arrow direction, keeping the coils tight.
- The line breaks at the eyelet. The line may be too thick for the eyelet, or the edge of the eyelet may be sharp. Use the gauge in your manual, and check the eyelet for wear.
- The head vibrates. Stop the trimmer and check that both lines are the same length and that the head is seated and tight. Unequal lines can unbalance the head.
Products that fit this job
If your head is a push-in or quick-load design, or if you need a replacement spool, these listings from the product pack match the task. The listings describe their own compatibility, so confirm the head brand and model before you order.
The Weed Warrior Push-N-Load head is a universal two-line head that the listing says fits lines from 0.050 to 0.155 inches. It is supplied with six precut 0.095-inch line strips and an adapter kit. The listing describes precut line that you insert into the head without winding a spool.
The HAUYUTAIS universal head is a no-spool design. The listing says it fits lines from 0.080 to 0.14 inches and includes a 15-piece adapter kit, and that it is loaded by threading a line through a cutting slot. The listing gives the line quantity as 12 pieces of 0.095-inch line.
The TOSRWGLL line listing is a 10-pack of 0.095-inch pre-cut twisted line, 16 feet per roll, for a Greenworks-compatible trimmer. The listing states that you should check that your head accepts 0.095-inch line before you buy.
Safety notes
Keep your fingers away from the cutting line and the blade guard while you work, and do not run a trimmer with the guard removed. Wear eye protection when you cut line or when you run the trimmer. Store spare line where children and pets cannot reach it, because the cut ends are sharp. If you have a hand or wrist condition that makes handling small parts difficult, ask a doctor or occupational therapist for a suitable tool or a pre-wound spool.
For a gas trimmer, let the engine cool before you touch the head, and disconnect the spark plug wire if the manual asks for it. For a battery trimmer, remove the pack before you open the head. If the head has a damaged housing, a cracked eyelet or a bent shaft, replace the part before you use the trimmer again.
FAQ
How much string do I need for a weed eater?
Most spools take about 10 to 20 feet of line. Check your manual for the exact length and gauge, because the spool size and the head design decide how much line fits. A rough guide is about 20 feet for many spool-type heads.
Which direction do I wind the string?
Follow the arrow direction on the spool when you wind. Winding the wrong way can prevent the line from feeding or cause it to tangle. If you cannot find an arrow, note the direction of the old line before you remove it.
Do I need to remove the spring when I load the line?
You may need to remove the spring to take the spool out of the head. Keep the spring and any washer in order, and put them back in the same position before you snap the cap on. A missing spring can stop the head from feeding line.
Why does my trimmer not release more line?
For a bump-feed head, you need to run the trimmer and tap the head on the ground to release line. For an auto-feed head, the line advances as the trimmer runs. Check that the line ends are free, that the spool is seated under its spring, and that the head is wound correctly.
Can I use any string in any trimmer?
No. Use the gauge your manual lists, because a line that is too thick or too thin can bind or wear fast. Some heads accept only specific diameters. The product listings in this guide state their accepted line sizes, and you should check the size against your head before you buy.
Should I replace the whole head or just the line?
If the head cracks, the eyelets are worn or the spring is broken, replace the head or the spool. If the head works and only the line is used up, a new spool or a pre-wound replacement is enough.
Bottom line
Loading weed eater string takes about ten minutes once you know your head type. Disconnect power, cut the right length, wind the line in the arrow direction, anchor it, thread the eyelets and reassemble. Then test the feed before you cut. If your head uses precut line, follow the product’s own loading method and skip the winding step. The manual for your trimmer always has the final word on line gauge and length.
Related reading: Best Ryobi ONE+ String Trimmers Compared covers string trimmers that use the same type of head, and How to Cut Tall Weeds With a String Trimmer explains cutting technique once the line is loaded.
