How to Change String on Dewalt Weed Eater? Fast

Introduction

Changing the trimmer line on a Dewalt weed eater is a routine maintenance task that keeps your yard looking sharp and your tool running efficiently. Whether you are a seasoned landscaper or a weekend gardener, knowing how to change string on Dewalt weed eater quickly can save you time and frustration. This guide walks you through every step, from selecting the right line to troubleshooting common feed problems, so you can get back to cutting grass and weeds with confidence.

Table of Contents

• Understanding Your Dewalt Weed Eater
• Types of Trimmer Line
• Tools and Safety Gear Needed
• Preparing the Weed Eater for Line Replacement
• Step‑by‑Step Guide: How to Change String on Dewalt Weed Eater
• Common Mistakes and How to Avoid Them
• Tips for Faster Line Changes
• Comparison Table: Dewalt Trimmer Line Options
• Maintaining Your Trimmer Head for Longevity
• Troubleshooting Line Feed Issues
• Frequently Asked Questions
• Conclusion

Understanding Your Dewalt Weed Eater

Dewalt offers several models of string trimmers, including the 20V MAX XR, the 60V MAX FlexVolt, and the corded 13‑amp versions. While the overall design is similar, the trimmer head geometry, line diameter compatibility, and feed mechanism can differ. Most current Dewalt heads use a bump‑feed system that advances line when you tap the head on the ground, but some older models feature a manual feed knob. Before you begin, locate the model number on the motor housing or the head assembly; this will tell you the maximum line diameter (usually .080‑.095 in) and whether the head accepts pre‑cut spools or bulk line.

Knowing the exact head type prevents you from buying the wrong spool or forcing a line that is too thick, which can jam the feed mechanism and reduce cutting performance. The owner’s manual provides a diagram of the head components—spool, eyelets, spring, and cap—that is useful to keep handy during the replacement process.

Types of Trimmer Line

Trimmer line comes in several shapes and materials, each suited to different vegetation and cutting conditions. Round line is the most common and works well for general grass and light weeds. Twisted or serrated line adds cutting edges that slice through thicker stems more cleanly. Square and star‑shaped lines provide aggressive cutting action for heavy brush but can wear the head faster. Dewalt’s own branded line is engineered to match the feed geometry of their heads, but high‑quality third‑party lines from manufacturers such as Oregon, Husqvarna, and Stihl also perform reliably.

Line diameter is critical. Most Dewalt heads accept .080 in, .095 in, or .105 in line. Using a diameter larger than specified can cause the spool to bind, while a smaller line may not feed consistently. For residential lawns, .080 in round line is usually sufficient. For commercial or overgrown areas, .095 in twisted or serrated line offers a good balance of durability and cutting speed.

Tools and Safety Gear Needed

Changing the line requires only a few basic items, but safety should never be overlooked. Gather the following before you start:

• Replacement trimmer line (correct diameter and length)
• Work gloves to protect hands from sharp line ends
• Safety glasses or goggles
• Flat‑head screwdriver (for heads with a retaining screw)
• Clean rag or shop towel
• Small brush (old toothbrush works) to clear debris from the head

If your model uses a quick‑release spool, you may not need any tools at all. Always disconnect the battery or unplug the corded unit before servicing the head to prevent accidental start‑up.

Preparing the Weed Eater for Line Replacement

Begin by placing the trimmer on a stable, flat surface. Remove the battery pack or unplug the power cord. Inspect the trimmer head for grass buildup, dirt, or tangled line remnants. Use the brush and rag to clean the exterior, paying special attention to the eyelets where the line exits. A clean head ensures smooth feeding and reduces the chance of jams.

Next, locate the spool release mechanism. On most Dewalt bump‑feed heads, you press two tabs on the side of the head and pull the spool straight out. On models with a retaining screw, loosen the screw with the screwdriver and lift the cap. Keep the spring and any small washers in a safe spot; they are easy to lose.

Step‑by‑Step Guide: How to Change String on Dewalt Weed Eater

1. Remove the old spool. Press the release tabs or unscrew the cap, then pull the spool out. Discard any remaining line fragments.
2. Measure and cut new line. Most Dewalt heads require two equal lengths of line, typically 10‑12 feet each. Unroll the bulk line, measure with a tape measure, and cut cleanly with scissors or a utility knife.
3. Insert the first line end. Find the anchor hole on the spool (often marked with an arrow). Thread one end of the line through the hole and pull until about 2‑3 inches remain inside the spool.
4. Wind the line onto the spool. Follow the direction indicated by the arrow on the spool (usually clockwise). Keep the line tight and evenly spaced; avoid overlapping. Continue winding until the spool is full but not overflowing.
5. Secure the line end. Most spools have a small notch or slot near the outer rim. Slip the free end into this notch to hold it in place.
6. Repeat for the second line. If your head uses a dual‑line system, repeat steps 3‑5 on the opposite side of the spool, winding in the same direction.
7. Reinstall the spool. Align the spool with the head housing, ensuring the line ends protrude through the eyelets. Press the spool until the tabs click or replace the cap and tighten the retaining screw.
8. Test the feed. Reattach the battery or plug in the cord. Start the trimmer and gently tap the head on the ground. The line should advance a few inches. If it does not, stop and verify that the line is not tangled inside the spool.
9. Trim excess line. If the line extends beyond the recommended cutting length (usually 4‑6 inches), trim it with scissors to avoid excessive vibration.
10. Final inspection. Run the trimmer for a minute, watching for smooth line feed and even cutting. Adjust as needed.

Common Mistakes and How to Avoid Them

One frequent error is winding the line in the wrong direction. The spool arrow indicates the feed direction; winding opposite causes the line to retract instead of advance. Another mistake is overfilling the spool, which creates tension that prevents the bump‑feed from releasing line. Always leave a small gap between the wound line and the spool flange.

Using the wrong line diameter is also common. A .105 in line in a .095 in head will jam the eyelets and may damage the feed spring. Conversely, a .065 in line may slip out of the anchor hole. Double‑check the specification label on the head before purchasing line.

Forgetting to clean the head before reassembly leads to debris entering the feed mechanism, causing inconsistent line advance. A quick brush‑out each time you change line eliminates this problem.

Tips for Faster Line Changes

• Pre‑cut bulk line. Keep a roll of the correct diameter in your tool bag and pre‑measure 10‑foot lengths at the start of the season.
• Use a spool winding tool. Simple handheld winders keep tension even and reduce hand fatigue.
• Mark the spool. A small piece of colored tape on the spool flange helps you quickly identify the correct winding direction.
• Keep a spare spool loaded. Having a second spool ready to swap eliminates downtime during large jobs.
• Lubricate the feed spring. A light spray of silicone lubricant on the spring (not the line) keeps the bump action smooth.

Comparison Table: Dewalt Trimmer Line Options

Maintaining Your Trimmer Head for Longevity

Regular maintenance extends the life of the head and ensures consistent line feed. After each use, wipe the head housing with a damp cloth to remove grass sap and dirt. Periodically remove the spool and inspect the feed spring for corrosion or deformation; replace it if it feels weak. Check the eyelets for wear—sharp edges can fray the line prematurely. If the head has a grease fitting, apply a small amount of lithium grease once per season. Store the trimmer in a dry place, and avoid leaving line wound on the spool for months, as it can develop memory and feed poorly.

Troubleshooting Line Feed Issues

If the line does not advance when you bump the head, first verify that the spool is seated correctly and the line ends are through the eyelets. Next, check for line tangles inside the spool; unwind and rewind if necessary. A worn or broken feed spring will not push the line forward—replace the spring kit available from Dewalt. If the motor runs but the head does not spin, the drive shaft or clutch may be damaged and require professional service. Finally, ensure the battery is fully charged; low voltage can reduce the centrifugal force needed for the bump‑feed to engage.

Frequently Asked Questions

How often should I change the trimmer line?

Line life depends on usage intensity and vegetation type. For typical residential mowing, expect to replace the line every 2‑3 hours of run time. Heavy brush cutting may require a change every hour.

Can I use any brand of trimmer line in my Dewalt weed eater?

Yes, as long as the diameter and shape match the head specifications. Dewalt‑branded line is optimized for their feed geometry, but high‑quality third‑party lines work well.

Why does my line keep breaking near the eyelet?

Sharp or burred eyelets, excessive line tension from over‑winding, or using a line diameter larger than specified can cause premature breakage. Inspect and smooth the eyelets, and follow the correct winding procedure.

My bump feed stopped working. What should I do?

Clean the head thoroughly, check the feed spring for damage, and ensure the spool rotates freely. If the spring is worn, replace it with the Dewalt spring kit.

Are pre‑cut spools worth the extra cost?

Pre‑cut spools save time and guarantee correct line length and winding direction. They are convenient for occasional users, but bulk line is more economical for frequent operators.

Conclusion

Mastering the process of swapping trimmer line on your Dewalt weed eater turns a potential chore into a quick, routine task. By selecting the right line, preparing the head properly, and following the step‑by‑step instructions outlined above, you can keep your tool cutting cleanly and efficiently all season long. Remember to avoid common pitfalls such as wrong winding direction or incorrect line diameter, and apply the maintenance tips to extend the life of your trimmer head. With a little practice, you’ll be able to change the string in under a minute, letting you focus on the job at hand—whether it’s a tidy lawn edge or a tangled thicket. Keep this guide handy, and you’ll always know exactly how to change string on Dewalt weed eater when the line runs low.