How to Put String in Dewalt Weed Eater? 20V/60V Spool Guide

Introduction

Dewalt weed eaters are a top choice for both residential homeowners and commercial landscapers, thanks to their durable build, long battery life, and consistent cutting power. But even the most reliable tool needs routine maintenance, and one of the most common upkeep tasks is replacing the trimmer string when it wears down, breaks, or runs out. Whether you own a compact 20V model for light yard work or a heavy-duty 60V model for tackling overgrown brush, knowing How to Put String in Dewalt Weed Eater? will save you money on replacement spools and keep your tool running at peak performance for years. This in-depth guide covers both voltage platforms, step-by-step loading instructions, pro tips to avoid jams, and answers to frequently asked questions, so you can get back to trimming in minutes.

Table of Contents

• Why You Need to Change Your Dewalt Weed Eater String Regularly
• Tools and Materials You’ll Need for the Job
• Key Differences Between 20V and 60V Dewalt Weed Eater Spools
• Safety Precautions Before You Start
• Step-by-Step: How to Put String in a 20V Dewalt Weed Eater
• Step-by-Step: How to Put String in a 60V Dewalt Weed Eater
• How to Wind String Correctly to Avoid Jams and Tangles
• Common Mistakes to Avoid When Loading Dewalt Weed Eater String
• Choosing the Right Replacement String for Your Dewalt Model
• Pro Maintenance Tips to Extend Your Spool and String Life
• Frequently Asked Questions About Dewalt Weed Eater String
• Conclusion

Why You Need to Change Your Dewalt Weed Eater String Regularly

Trimmer string takes a beating with every use. As it spins at high speeds, it rubs against grass, weeds, dirt, rocks, and other debris, which wears down the nylon material over time. Worn or damaged string cuts less efficiently, forcing your weed eater’s motor to work harder to get the job done. This extra strain can lead to overheating, reduced battery life, and even permanent motor damage if left unaddressed. Regularly replacing your string ensures your Dewalt trimmer cuts cleanly, runs smoothly, and lasts for years. If you notice your string breaking frequently, fraying, or leaving uneven edges on grass and weeds, it’s a clear sign it’s time for a replacement.

Tools and Materials You’ll Need for the Job

Loading new string into your Dewalt weed eater requires no special tools, but having these items on hand will make the process faster and easier:

• Replacement trimmer string (correct diameter for your Dewalt model)
• Clean, dry rag
• Work gloves (to avoid cuts from sharp string ends)
• Small flathead screwdriver (optional, for stuck spool caps)
• Scissors or wire cutters (to trim string to length)
• Dewalt weed eater battery (for testing after loading)

Pro Tip: Keep a pre-loaded spare spool in your garage or toolbox so you can swap it out in seconds when you run out of string mid-yard work, instead of having to stop and load new string on the spot.

Key Differences Between 20V and 60V Dewalt Weed Eater Spools

While the core process of loading string is similar for both 20V and 60V Dewalt weed eaters, there are a few key differences between the two spool designs that impact how you load them. The table below breaks down the main distinctions:

The largest difference between the two platforms is spool size: 60V spools hold more string to handle longer work sessions without needing to reload, and they often have a more robust release mechanism to stand up to heavy commercial use. We’ll cover step-by-step loading instructions for each voltage below.

Safety Precautions Before You Start

Before you begin loading string, take these simple safety steps to avoid injury or damage to your tool:

• Disconnect the battery first: Even if your weed eater is turned off, always remove the battery pack before working on the trimmer head to avoid accidental startup. Press the release button on the battery and pull it straight out of the tool’s port.
• Wear work gloves: Trimmed string ends are extremely sharp and can cause deep cuts if you handle them without protection.
• Work on a stable surface: Place the weed eater on a flat workbench or the ground so it doesn’t tip over while you’re working.
• Keep children and pets away: The sharp string and small parts can be a hazard to kids and animals, so work in a clear, isolated space.
• Avoid loose clothing: Tie back long hair and avoid wearing baggy sleeves that could get caught in the trimmer head if it accidentally powers on.

Step-by-Step: How to Put String in a 20V Dewalt Weed Eater

If you’ve been asking How to Put String in Dewalt Weed Eater? for your 20V compact model, the process is quick and straightforward, requiring no special tools. Follow these steps to get your trimmer back up and running in minutes:

1. Disconnect the 20V battery from the weed eater by pressing the release button on the battery pack and pulling it straight out of the tool’s battery port. Double-check that the trigger is locked and the trimmer will not power on.
2. Flip the weed eater upside down so the trimmer head is facing up. Locate the spool release tab on the bottom center of the trimmer head. Press the tab down while twisting the spool cap counter-clockwise to loosen it.
3. Pull the spool cap straight off the trimmer head, then lift out the old empty spool. Set the cap aside in a safe spot so it doesn’t get lost.
4. Use a clean rag to wipe away any grass clippings, dirt, or debris from the inside of the trimmer head and the spool cap. Buildup here can cause the new string to jam or the spool to sit improperly.
5. Take your new replacement string, and cut two equal lengths of 5 to 6 feet each (for a total of 10–12 feet, matching the 20V spool’s max capacity). Fold each strand in half to find the center point.
6. Insert the folded center of the two strands into the small notch on the center of the spool. Pull the strands through so that the folded end is seated in the notch, with both loose ends hanging down on either side of the spool.
7. Hold the folded center end taut against the spool, then wind the string around the spool in the clockwise direction (follow the arrow printed on the side of the spool for confirmation). Wind tightly and evenly, making sure the strings do not cross over each other as you go. Leave approximately 6 inches of string hanging out of the eyelets on either side of the spool when you are done winding.
8. Take one of the loose string ends and thread it through the small eyelet on the side of the spool cap. Repeat with the second string end, threading it through the opposite eyelet on the cap.
9. Align the spool’s center notch with the peg in the center of the trimmer head, then lower the spool into place. Make sure the loose string ends are pulled taut through the eyelets as you set the spool down.
10. Place the spool cap back over the spool, press down firmly, and twist it clockwise until it locks into place. You should hear a soft click when the cap is fully secured.
11. Pull both loose string ends to make sure they are the same length (trim with scissors if needed). Reattach the 20V battery to the weed eater, and test the trimmer on a small patch of grass to confirm the string is feeding correctly.

Step-by-Step: How to Put String in a 60V Dewalt Weed Eater

For 60V heavy-duty Dewalt weed eaters, the string loading process is similar but has a few key differences due to the larger spool size and quick-release design. If you need to know How to Put String in Dewalt Weed Eater? for your 60V model, follow these steps:

1. Disconnect the 60V battery from the weed eater by pressing the battery release latch and pulling the pack straight out. Verify the trimmer is powered off by pressing the trigger once to confirm it does not start.
2. Flip the weed eater upside down. For 60V models with a quick-release lever, locate the lever on the side of the trimmer head, press it down, and pull the entire trimmer head assembly off the drive shaft. For models with a twist-off cap, follow the same process as the 20V: press the release tab and twist the cap counter-clockwise to remove it.
3. If you removed the entire trimmer head, twist the spool cap counter-clockwise to separate it from the spool housing. Lift out the old empty spool, and set all components aside in a safe spot.
4. Wipe down the inside of the spool housing, the trimmer head, and the spool cap with a clean rag to remove any built-up grass, mud, or debris. Check the drive shaft for any tangled string or dirt, and clean that as well to ensure smooth operation.
5. Cut two equal lengths of 6 to 9 feet each (for a total of 12–18 feet, matching the 60V spool’s larger capacity) of the correct diameter trimmer string for your model. Fold each strand in half to find the center point.
6. Insert the folded center of the two strands into the notch on the center of the 60V spool, just like you did with the 20V spool. Pull the strands through so the folded end is secured in the notch.
7. Hold the folded center end taut, then wind the string around the spool in the clockwise direction (follow the arrow printed on the spool). Wind tightly and evenly, avoiding crossed strands. Leave 6–8 inches of string hanging out of the eyelets on either side of the spool when finished.
8. Thread each loose string end through the corresponding eyelet on the spool cap, just like with the 20V model.
9. Align the spool’s center notch with the peg in the spool housing, then lower the spool into place. Pull the string ends taut as you set the spool down to ensure they are seated properly in the eyelets.
10. Twist the spool cap clockwise until it locks into place. If you removed the entire trimmer head, reattach it to the drive shaft by aligning the pegs and twisting clockwise until it clicks into place.
11. Pull both string ends to confirm they are even, trim if necessary with scissors. Reattach the 60V battery, and test the trimmer to ensure the string feeds correctly when you bump the bottom of the trimmer head on the ground (for bump-feed models) or automatically (for automatic feed models).

How to Wind String Correctly to Avoid Jams and Tangles

Proper string winding is the most important factor in preventing jams, tangles, and feeding issues with your Dewalt weed eater. Follow these tips to wind your string correctly every time:

• Always follow the winding direction arrow on the spool: Almost all Dewalt spools are designed to be wound clockwise. Winding in the opposite direction will cause the string to loop and tangle inside the spool housing, leading to frequent jams and broken string.
• Don’t overfill the spool: Packing the spool to the brim with string will prevent it from feeding properly. Stick to the recommended string length for your model (10–12 feet for 20V, 12–18 feet for 60V) to leave enough room for the string to move freely.
• Wind evenly and tightly: Spread the string out evenly across the spool as you wind to avoid bunching in one spot. Wind tightly enough that the string doesn’t slip, but not so tight that it’s impossible to pull the ends through the eyelets.
• Leave enough slack in the string ends: If you don’t leave 6–8 inches of string hanging out of the eyelets after winding, the string won’t advance when you use the trimmer. For dual-line spools, make sure both strands are the same length to avoid excessive vibration and uneven cutting.

Common Mistakes to Avoid When Loading Dewalt Weed Eater String

Even experienced users make these common errors when loading new string, leading to frustration and wasted time. Avoid these pitfalls to make the process smooth every time:

• Skipping the battery disconnection step: Failing to remove the battery before working on the trimmer head can lead to accidental startup, causing serious injury or damage to the tool.
• Using the wrong string diameter: String that is too thick will not fit through the spool eyelets, and string that is too thin will break easily under the stress of cutting. Always check your model’s specifications for the recommended diameter.
• Winding the string in the wrong direction: This is the most common cause of jams and tangled string. Always double-check the arrow on the spool before you start winding.
• Not cleaning debris from the trimmer head: Old grass clippings and dirt built up inside the trimmer head can cause new string to jam or break prematurely. Wipe down all components before loading new string.
• Forgetting to test the trimmer after loading: Always test the trimmer on a small patch of grass before taking it out for a full yard work session. This will catch issues like uneven string length or feeding problems early, so you don’t waste time troubleshooting in the middle of a job.

Choosing the Right Replacement String for Your Dewalt Model

Using the correct trimmer string is critical for performance and tool longevity. Dewalt recommends using only high-quality nylon trimmer line designed for battery-powered electric trimmers. Here’s how to choose the right string for your model:

• .065″ diameter: Best for light-duty 20V trimmers used for cutting grass and small, thin weeds in small yards. This thin string is easy to feed and causes less strain on the motor.
• .080″ diameter: The standard size for most 20V and 60V Dewalt trimmers, suitable for cutting grass, medium weeds, and light brush.
• .095″ diameter: Designed for heavy-duty 60V trimmers used for commercial landscaping, thick brush, and overgrown weeds. This thicker string is more durable and cuts through tough material more efficiently.

Avoid using metal line, braided line, or homemade string replacements, as these can damage the trimmer head and motor, and pose a serious safety hazard if they break and fly off at high speed. Also, avoid using trimmer line labeled for gas-powered trimmers, as it is often thicker and made of harder material that can damage the motor and spool of your battery-powered Dewalt model.

Pro Maintenance Tips to Extend Your Spool and String Life

With proper care, your Dewalt weed eater spool and string can last for months or even years. Follow these pro tips to extend their lifespan:

• Clean the trimmer head and spool after every 2–3 uses to remove built-up grass, mud, and debris. This prevents jams and ensures the spool sits properly in the trimmer head.
• Store extra trimmer string in a cool, dry place, out of direct sunlight, to prevent it from becoming brittle and breaking easily.
• Check the string for wear, fraying, or nicks before each use, and replace it if it is damaged. Worn string cuts less efficiently and puts unnecessary strain on the motor.
• Don’t force the trimmer through thick brush, woody stems, or rocks. This will break the string quickly and can damage the motor and spool.
• If you notice the string is feeding inconsistently, check the spool for tangled string or debris, and clean it out before loading new string.
• Replace the entire spool if it shows signs of cracking, warping, or broken eyelets, as a damaged spool will cause feeding issues no matter how well you load the string.

Frequently Asked Questions About Dewalt Weed Eater String

How often should I replace the string on my Dewalt weed eater?

Most users need to replace their trimmer string every 2–4 hours of use, depending on the type of weeds and debris they are cutting. If you notice the string is frayed, broken, or cutting less efficiently, it’s time to replace it, even if you haven’t hit the 2-hour mark.

Can I use third-party trimmer string in my Dewalt weed eater?

Yes, as long as the third-party string is high-quality nylon trimmer line with the correct diameter for your model. Avoid cheap, low-quality string, as it breaks easily and can damage your spool and trimmer head. Genuine Dewalt string is optimized for their spools and will give you the best performance and longest life.

Why is my new string breaking immediately after I load it?

This is usually caused by one of three issues: you wound the string in the wrong direction, causing it to tangle and jam; you overfilled the spool, so the string is too tight to feed; or you used string that is too thin for your model, so it breaks under the stress of cutting. Double-check the winding direction, spool capacity, and string diameter to fix this issue.

Can I load single-line string instead of dual-line in my Dewalt weed eater?

Most Dewalt 20V and 60V weed eaters are designed for dual-line use, but you can load single line if you prefer. To do this, cut one long strand of string (10–12 feet for 20V, 12–18 feet for 60V), thread one end through both eyelets on the spool cap, wind it around the spool, and leave 6 inches hanging out. Note that single-line trimmers cut less efficiently than dual-line, so you may need to make more passes to cut through thick weeds.

How do I know if my spool is compatible with 20V or 60V batteries?

Spools are model-specific, not voltage-specific: a 20V spool will fit any 20V Dewalt weed eater, and a 60V spool will fit any 60V model. You can find the correct spool for your model by checking the model number printed on the side of your weed eater (usually on the motor housing) and looking up the compatible replacement spool on Dewalt’s website or your local hardware store.

What should I do if the spool cap won’t twist off?

If the spool cap is stuck, don’t force it, as you could break the plastic tabs. Spray a small amount of penetrating oil (like WD-40) around the base of the cap, let it sit for 5–10 minutes, then try twisting it again. If it still won’t budge, use a small flathead screwdriver to gently pry the release tab up while twisting the cap.

Conclusion

Learning How to Put String in Dewalt Weed Eater? is a simple, valuable skill that will save you money on replacement spools and keep your tool running at peak performance for years. Whether you have a 20V compact model for home use or a 60V heavy-duty model for commercial jobs, following the step-by-step instructions, using the correct string, and avoiding common mistakes will ensure your weed eater works reliably for every yard work session. Bookmark this guide for next time you need to replace your string, and you’ll have the job done in 5 minutes or less, no professional help required.