How to Load Ego Weed Eater? Quick & Easy Steps

Introduction

Ego’s battery-powered weed eaters are a top choice for homeowners and professional landscapers alike, thanks to their quiet operation, zero emissions, and low maintenance design. One of the most routine upkeep tasks users need to master is loading new trimmer string, and many people search for “How to Load Ego Weed Eater?” because the process can feel confusing for first-time owners, even though it is designed to be simple. This comprehensive guide covers every Ego model lineup, step-by-step loading instructions, compatible string types, troubleshooting tips, and best practices to help you complete the task in minutes, no special tools or experience required.

• Introduction
• Understanding Your Ego Weed Eater
• Common Ego Models and Compatible String Types
• Tools and Materials You’ll Need
• Step-by-Step Guide: How to Load Ego Weed Eater
• Comparison of Ego Weed Eater String Loading Methods
• Tips for Easy and Long-Lasting String Loading
• Common Mistakes to Avoid When Loading Your Ego Weed Eater
• Troubleshooting Common Loading Issues
• Frequently Asked Questions
• Conclusion

Understanding Your Ego Weed Eater

Ego produces a wide range of cordless weed eaters under its Power+ line, including 15-inch, 17-inch, and 20-inch cutting swath models, as well as compact Select Cut variants designed for precision trimming. Nearly all consumer Ego weed eaters use a bump-feed or automatic feed system for trimmer string, and the core spool design is consistent across most of the lineup, meaning the basic loading process is nearly identical for almost every model. The brand specifically recommends using only Ego-branded trimmer string or approved third-party alternatives to avoid damage to the feed mechanism, maintain cutting performance, and preserve your tool’s warranty. Using unapproved string types or incorrect diameters can lead to frequent jams, premature motor wear, and even void your product warranty in some cases.

Common Ego Models and Compatible String Types

The most popular Ego weed eater models include the ST1500 (15-inch entry-level), ST1511T (15-inch with Powerload automatic loading), ST1712 (17-inch mid-range), ST2012 (20-inch heavy-duty), and the Select Cut ST1502. Most 15-inch models use 0.080-inch round trimmer string, while the larger 17-inch and 20-inch models use 0.095-inch round string to handle thicker vegetation. Ego’s Powerload-enabled models, such as the ST1511T, feature an automatic string loading function that simplifies the process even further, but the manual loading steps covered in this guide remain useful for situations where the automatic system jams or you need to replace the spool entirely. Ego does not recommend using square, serrated, or twisted string in most consumer models, as these designs cause excessive vibration and can damage the tool’s gearbox over time.

Tools and Materials You’ll Need

One of the biggest advantages of Ego weed eaters is that loading string requires no special tools for most models. You will only need the following items to complete the process:

• New Ego-approved trimmer string, cut to the correct diameter for your model
• Replacement spool (only if your old spool is cracked, frayed, or has worn feed holes; most Ego models sell replacement spools separately)
• Flathead screwdriver (only for older models with stiff spool locks that are hard to release by hand)
• Work gloves (to protect your hands from sharp string edges and debris)
• Clean cloth (to wipe debris out of the spool housing before loading)

Having the correct string diameter on hand is the most critical pre-requisite, as using the wrong size is the leading cause of feeding issues and motor damage. If you are unsure of your model’s required string size, check the label on your old spool, your owner’s manual, or Ego’s official website for specifications.

Step-by-Step Guide: How to Load Ego Weed Eater

Follow these steps to load string into any Ego weed eater model, whether you have a manual feed or Powerload automatic system. The process takes 5 to 10 minutes for most users.

Step 1: Prepare Your Weed Eater for String Replacement

First, prioritize safety by powering off your Ego weed eater and removing the battery pack (or unplugging the unit if you own a rare corded Ego model). This eliminates the risk of accidental startup while you work on the cutting head, which can cause serious injury. Lay the tool on a flat, clean surface with the cutting head facing up for easy access. Consult your owner’s manual to see if your model requires removing the deflector shield for spool access – some users find this step makes loading easier, while others leave it attached. If there is leftover string, grass clippings, or debris in the spool housing, wipe it out with a clean cloth to prevent jams later.

Step 2: Remove the Old Spool or Empty String

Nearly all Ego weed eaters have a spool lock button or small tab on the bottom of the cutting head. Press this lock to release the spool, then twist the spool counterclockwise to pull it free from the housing. If your model uses a fixed, non-removable spool, unwind any remaining old string from the spool before proceeding. For removable spools, set the old spool aside: if it is undamaged and the feed holes are not worn, you can reuse it, but if it is cracked or frayed, replace it with a new Ego-approved replacement spool to avoid feeding issues. Some older Ego models have a stiff spool lock that requires a flathead screwdriver to release, so keep one handy if you encounter resistance.

Step 3: Prepare the New Trimmer String

Start by cutting your new Ego-approved trimmer string to the length specified for your model – most Ego weed eaters require 10 to 15 feet of string, depending on the cutting head size. Check your owner’s manual or the label on your old spool for the exact recommended length for your unit. Cut the string cleanly with scissors or a utility knife, then fold it in half to locate the center point. For dual-line models, cut two equal lengths of string and fold each in half separately. It is critical to use string with the correct diameter for your model: 15-inch Ego models typically use 0.080-inch round string, while 17-inch and 20-inch heavy-duty models use 0.095-inch round string. Using the wrong diameter will cause feeding jams and can damage the tool’s motor over time.

Step 4: Load the String into the Spool

This is the core step of the process, and it varies slightly depending on whether you have a single-line or dual-line model. For single-line models: insert the center loop of your folded string into the feed hole on the spool, then wind the string tightly and evenly around the spool in the direction indicated by the printed arrow on the spool (all Ego spools include this arrow to eliminate confusion). Leave approximately 6 inches of string hanging out of the feed hole when you finish winding. For dual-line models: insert the center loop of each folded string into one of the two feed holes on the spool, then wind each string tightly and evenly in the direction of the arrow, taking care that the two strings do not cross over each other as you wind. Leave 6 inches of each string hanging out of the feed holes when done. Avoid overwinding the spool, as this will cause the string to bind and prevent feeding.

Step 5: Reinstall the Spool and Test

Once the string is loaded, align the spool with the slots in the cutting head housing, then twist it clockwise until it clicks into place. Confirm that the spool lock engages fully to keep the spool from coming loose during use. If you removed the deflector shield earlier, reattach it securely now. Reinsert the battery pack (or plug in the tool), then test the feed system: for bump-feed models, press the trigger and tap the bottom of the cutting head on the ground – the string should extend automatically. For automatic feed models, release the trigger after a few seconds of use and the string should extend on its own. If the string does not feed, double-check that you wound it in the correct direction and that it is not overwound.

Comparison of Ego Weed Eater String Loading Methods

Ego offers two primary string loading methods across their weed eater lineup: manual loading, which is standard on all models, and the proprietary Powerload automatic loading system, which is included on select higher-end models. The table below compares the two methods to help you understand which applies to your tool and what to expect from each process.

Even if you own a Powerload model, knowing how to manually load the string is a useful backup skill if the automatic system fails, the battery dies mid-reload, or you need to replace the spool entirely. Many long-time Ego users prefer manual loading because it gives them more control over winding tension, which can lead to fewer jams over time.

Tips for Easy and Long-Lasting String Loading

Follow these best practices to make string loading faster, easier, and to extend the life of both your string and your weed eater:

• Always verify the correct string diameter for your specific model before purchasing replacement string. Using the wrong size is the leading cause of feeding jams and premature motor wear in Ego weed eaters.
• Wind the string with consistent, firm tension to ensure even feeding. Loose winding is the second most common cause of loading issues, as it leads to tangles and uneven string extension.
• Keep a note of the recommended string length for your model in your garage or workshop, so you always cut the correct amount. Excess string can tangle in the housing, while too little string will require frequent reloading.
• Wipe down the spool housing and spool after every 5 to 10 uses to remove grass clippings, dirt, and debris that can cause the spool to stick or the feed holes to clog.
• If you own a Powerload model, run the automatic loading function every few uses to keep the feed sensor and mechanism clean and free of debris. Even if the automatic system works, knowing how to manually load the string is a useful backup if the system jams or the battery dies mid-reload.
• Store spare string and replacement spools in a dry, temperature-controlled space to prevent the string from becoming brittle or warping, which can cause feeding issues and breakage during use.

Common Mistakes to Avoid When Loading Your Ego Weed Eater

Many users run into avoidable issues when loading their Ego weed eater string, simply because they skip key steps or use the wrong materials. Avoiding these common mistakes will save you time and frustration:

• Using incorrect string diameter: This is the most frequent error. Always check your owner’s manual or the label on your old spool to confirm the correct diameter for your model. A larger diameter than recommended will bind in the feed mechanism, while a smaller diameter will slip and fail to cut effectively.
• Winding the string in the wrong direction: All Ego spools have a directional arrow printed on their surface to indicate the correct winding direction. Winding in the opposite direction will cause the string to tangle and fail to feed when you use the tool.
• Overwinding the spool: It may seem like adding extra string will reduce how often you need to reload, but overwinding causes the string to bind and can damage the feed mechanism. Stick to the recommended length for your model, and leave 6 inches of string hanging out of the feed hole after winding.
• Letting string cross over itself during winding: This is especially common with dual-line models. Crossed string will tangle and jam immediately during use, so take care to wind each line tightly and evenly without overlapping.
• Skipping battery removal: Always remove the battery pack before working on the cutting head to avoid accidental startup, which can cause serious lacerations or other injuries.

Troubleshooting Common Loading Issues

Even when you follow all steps correctly, you may encounter occasional loading or feeding issues. The following fixes address the most common problems users face:

• String will not feed after loading: First, confirm you wound the string in the correct direction by checking the arrow on the spool. Next, ensure you did not overwind the spool – unwind 2 to 3 turns to see if this resolves the issue. If the string still will not feed, verify you are using the correct string diameter for your model, and check that the feed holes in the spool and cutting head are not clogged with debris.
• String feeds too quickly or too slowly: This is almost always caused by inconsistent winding tension. If the string is wound too loosely, it will feed too quickly and tangle. If it is wound too tightly, it will not extend at all. Rewind the string with firm, even tension to fix this issue.
• String breaks frequently after loading: This is usually caused by using the wrong string diameter, or a dull cutting blade. Confirm you are using the correct string for your model, and sharpen or replace the cutting blade if it is worn or nicked.
• Spool will not lock into place: Ensure the spool is aligned correctly with the slots in the cutting head housing. If it still will not lock, check that the spool lock mechanism is not broken, and that there is no debris blocking the lock tabs. You may need to replace the spool if the lock tabs are cracked or missing.
• Powerload automatic system will not activate: First, confirm the battery is fully charged, as low power can cause the automatic system to fail. Next, check that the spool is installed correctly, and that the feed sensor on the cutting head is not blocked by debris. If the system still does not work, you can manually load the string using the steps outlined earlier in this guide.

Frequently Asked Questions

How often should I replace my Ego weed eater string?

The frequency of string replacement depends on your usage and the type of vegetation you cut. For light residential use (trimming grass around sidewalks and flower beds once a week), replace the string every 1 to 3 months. For heavy use (cutting thick weeds, brush, or commercial landscaping), you may need to replace it every 2 to 4 weeks. You will know it is time to replace the string when it becomes frayed, worn, or shorter than 2 to 3 inches extending from the cutting head, or when it stops feeding correctly.

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

Yes, you can use third-party trimmer string as long as it matches the diameter and type specified for your model. Ego recommends their branded string for optimal performance and to avoid warranty issues, but many high-quality third-party round trimmer strings work equally well. Avoid square, serrated, or twisted string unless your owner’s manual explicitly states it is compatible, as these can cause excessive vibration and damage the gearbox.

Why won’t my Ego weed eater feed string after loading?

The most common causes are: 1) you wound the string in the wrong direction (check the arrow on the spool), 2) you overwound the spool, causing the string to bind, 3) you used the incorrect string diameter for your model, 4) debris is blocking the feed holes in the spool or cutting head, or 5) the feed mechanism is damaged. Follow the troubleshooting steps outlined earlier to identify and resolve the issue.

What string diameter is best for my Ego weed eater?

The correct diameter depends on your specific model. Most 15-inch Ego weed eaters use 0.080-inch round string, while 17-inch and 20-inch heavy-duty models use 0.095-inch round string. Check the label on your old spool, your owner’s manual, or Ego’s official website for the exact specification for your unit. Using the correct diameter ensures optimal cutting performance and prevents damage to the tool’s motor.

Do I need to wear gloves when loading Ego weed eater string?

While not mandatory, wearing work gloves is highly recommended. New trimmer string has sharp edges that can cut your fingers, especially when handling large amounts. Gloves also protect your hands from sharp edges on the spool or cutting head, and from dirt and debris stuck in the spool housing.

Conclusion

Loading your Ego weed eater string is a quick, straightforward maintenance task that anyone can complete with the right guidance, no special tools or experience required. Whether you own a basic manual-feed model or a high-end Powerload automatic unit, following the step-by-step process outlined in this guide will ensure you load the string correctly every time, avoiding common jams, feeding issues, and unnecessary wear on your tool. Remember to always use the correct string diameter for your model, wind the string tightly and evenly in the direction of the arrow on the spool, and follow basic safety steps like removing the battery before working on the cutting head. By avoiding the common mistakes covered here and following the best practices for string loading, you can keep your Ego weed eater running smoothly for years, and get back to trimming your lawn in minutes whenever the string runs out. If you encounter issues not covered in this guide, consult your model’s owner’s manual or contact Ego’s customer support for further assistance.