How to Add String to Kobalt Weed Eater? Kobalt String Guide

Introduction

A Kobalt weed eater is a reliable tool for keeping your lawn and garden edges tidy, but like any string trimmer, its performance depends heavily on having the right amount of cutting string properly installed. Whether you are dealing with a manual feed, automatic feed, or bump feed system, knowing how to add string to a Kobalt weed eater correctly can save you time, prevent frustration, and extend the life of your tool. This guide will walk you through every step of the process, from choosing the right string type to troubleshooting common issues, so you can get back to trimming with confidence.

• Understanding Your Kobalt Weed Eater
• Types of String and Why They Matter
• Preparation Before You Begin
• Step-by-Step Guide to Adding String
• Manual Feed Systems Explained
• Automatic Feed Systems Explained
• Bump Feed Systems Explained
• Common Problems and Troubleshooting
• Comparison of String Types
• Tips and Best Practices
• Common Mistakes to Avoid
• When to Replace the Entire Head
• Maintenance Schedule
• Frequently Asked Questions
• Conclusion

Understanding Your Kobalt Weed Eater

Before you begin adding string to your Kobalt weed eater, it is important to understand the basic components and how they work together. The cutting string is housed in a spool or cartridge located in the cutting head at the bottom of the trimmer. Depending on your model, the head may be removable or fixed, and the string may be fed manually, automatically, or through a bump mechanism. Recognizing which type of system your specific Kobalt model uses will ensure that you follow the correct procedure and avoid damaging any internal components during the restringing process.

Kobalt offers several series of weed eaters, including the 20V, 40V, and 60V cordless models, as well as gas-powered variants. Each series may have slight differences in head design, but the fundamental principles of string installation remain largely consistent across the product line. Consulting your user manual is always recommended, but this guide will cover the most common configurations so you can proceed even if you do not have the manual handy.

Types of String and Why They Matter

Not all trimmer string is created equal. The material and thickness of the string you choose can significantly impact cutting performance, durability, and compatibility with your Kobalt weed eater. The most common types of string include nylon monofilament, coextruded nylon, and ablation-resistant blends. Nylon monofilament is the standard choice for most residential applications due to its balance of flexibility and strength. Coextruded nylon offers enhanced durability and resistance to wear, making it suitable for heavier-duty trimming tasks. Ablation-resistant strings are designed to withstand high RPMs and are often used in commercial-grade trimmers, though they may be overkill for typical home use.

String diameter is another critical factor. Common sizes range from 0.065 inches to 0.095 inches, with thicker strings providing greater cutting power at the expense of requiring more line capacity on the spool. Kobalt typically recommends a diameter between 0.065 and 0.080 inches for most consumer models. Using a string that is too thick can cause excessive wear on the motor or engine, while one that is too thin may break frequently and require constant replacement. Always check your owner’s manual or the specifications listed on the cutting head to confirm the recommended diameter for your model.

Preparation Before You Begin

Taking a few moments to prepare before you start the restringing process can make the entire job much smoother and reduce the risk of errors. First, disconnect the battery or remove the spark plug wire to ensure the tool cannot accidentally start while you are working on it. Place the trimmer on a stable work surface, ideally one that is clean and well-lit, and gather all necessary tools and materials. You will need the new string, scissors or wire cutters, and possibly a small flathead screwdriver depending on your model. Having a container or small bag nearby to hold old string and debris will also help keep your workspace organized.

Inspect the cutting head for any signs of damage, such as cracks in the housing or worn-down eyes where the string exits the head. If you notice significant damage, it may be time to replace the entire cutting head assembly rather than just the string. Also, take note of how the old string is wound. Most Kobalt trimmers use a clockwise winding pattern, but some models may differ. Observing the direction of the existing string will help you replicate the correct winding technique and prevent tangles or improper feeding.

Step-by-Step Guide to Adding String

1. Turn off and disconnect the power source. Remove the battery pack or disconnect the spark plug wire to prevent accidental startup during maintenance.
2. Flip the trimmer upside down and locate the cutting head release mechanism. Most Kobalt models have a button, tab, or lever that must be pressed or slid to remove the head cover.
3. Remove the cutting head cover or cap. Some heads unscrew counterclockwise, while others simply pop off. Apply gentle pressure and avoid forcing any components.
4. Take out the old spool. If the spool is reusable, inspect it for damage. Replace it if the hub is cracked or the flange is deformed.
5. Cut a length of new string. Measure approximately 6 to 8 feet of string, depending on the spool size. Too little string will require frequent replacements, while too much can cause tangling.
6. Thread the string through the anchor hole. Insert one end of the string into the small hole in the center of the spool and pull it through until about an inch remains on the other side.
7. Wind the string onto the spool. Always wind in the direction indicated by the arrows on the spool or head. Maintain even tension to avoid loose coils that can jam during operation.
8. Leave a tail of about 2 inches. This tail will help the string feed smoothly when you reinstall the spool.
9. Reinstall the spool into the cutting head. Ensure it sits flush and rotates freely without binding.
10. Replace the head cover. Secure it according to the manufacturer’s instructions, whether it snaps on, screws in place, or requires a locking mechanism.
11. Reconnect the power source. Reattach the battery or reconnect the spark plug wire, then test the trimmer briefly to confirm proper string feeding.

Manual Feed Systems Explained

Manual feed systems are the simplest type of string delivery mechanism found on Kobalt weed eaters. With this setup, the user must manually pull the string through the cutting head when it becomes too short to be effective. To add string to a manual feed system, follow the general steps outlined above, but pay special attention to how the string passes through the exit eyelets on the cutting head. After installing the spool, you will need to manually pull the string until it extends approximately 10 to 12 inches from each side of the head. This ensures adequate cutting length while minimizing the risk of the string tangling or binding inside the head.

When using a manual feed trimmer, it is important to pause periodically during operation to check the string length and manually extend it as needed. This can be done by turning off the tool, pressing the feed button or lever, and pulling the string until the desired length is achieved. While this method requires more user intervention than automatic systems, it also provides greater control over string usage and can be more economical in terms of string consumption.

Automatic Feed Systems Explained

Automatic feed systems, often referred to as auto-feed or bump-free systems, automatically dispense more string when the existing length becomes too short. These systems rely on centrifugal force and spring tension to feed the string as the head rotates. When adding string to an automatic feed Kobalt weed eater, the winding process is similar to manual feed models, but you must ensure the string is wound tightly and evenly to prevent jamming. The spool should rotate smoothly within the housing, and the string should not overlap itself during winding.

After reinstalling the spool, the automatic feed mechanism should engage without issue. However, if the string fails to feed automatically, check that the spool is seated correctly and that there are no obstructions in the feed channel. Some automatic feed heads also feature a small hole or slot where you can manually advance the string if needed. Always refer to your model’s manual for specific instructions related to the automatic feed feature, as the exact mechanism can vary between different Kobalt trimmer models. (See Also:How To Start Fs 38 Stihl Weed Eater)

Bump Feed Systems Explained

Bump feed systems are among the most popular string delivery methods on Kobalt weed eaters. With this design, the user taps the trimmer head against the ground while it is running to release additional string. The mechanism works by using centrifugal force to push the string outward through the eyes of the cutting head. When the string is too short, tapping the head releases a small amount of new line, which extends the usable length.

To add string to a bump feed system, begin by removing the head cover and spool as described in the general guide. Wind the new string in the same direction as the original, paying close attention to maintaining consistent tension. After reinstalling the spool, test the bump feed function by briefly activating the trimmer and tapping the head against a soft surface. If the string does not extend properly, check for obstructions or incorrect winding direction. It is also important to ensure that the string is not wound too tightly, as this can prevent the bump mechanism from releasing new line.

Common Problems and Troubleshooting

Even with careful attention to detail, you may encounter issues when adding string to your Kobalt weed eater. One of the most frequent problems is string tangling inside the cutting head. This typically occurs when the string is wound unevenly or in the wrong direction. To resolve this, remove the spool and rewind the string carefully, ensuring that each layer lies neatly beside the previous one without overlapping. Another common issue is the string failing to feed at all. This can be caused by a blockage in the exit eyelets, a loose spool, or incorrect installation. Inspect the head for debris and make sure all components are properly seated.

If the string breaks repeatedly, it may be due to using a diameter that is too thin for your trimming tasks or operating the trimmer at too high a speed. Switching to a thicker, higher-quality string and adjusting your technique can help reduce breakage. Additionally, if the automatic or bump feed mechanism is not working, check that the spring inside the head is intact and that the spool rotates freely. In some cases, a damaged or worn spool may need to be replaced entirely rather than refilled.

Comparison of String Types

Choosing the right string for your Kobalt weed eater can make a noticeable difference in performance and longevity. The table below compares the most commonly available string types to help you make an informed decision based on your trimming needs and budget.

Each type of string has its own advantages and trade-offs. Nylon monofilament is the most affordable and widely available option, making it a good choice for casual users who trim their lawns regularly. Coextruded nylon provides better resistance to abrasion and UV damage, which makes it ideal for users who work in rough terrain or around hard surfaces. Ablation-resistant strings are specifically engineered for high-speed applications and are typically used in commercial settings where durability is paramount. Square or star-shaped strings offer a larger cutting surface area, which can improve efficiency on certain types of vegetation, though they may not be compatible with all Kobalt models.

Tips and Best Practices

To get the most out of your Kobalt weed eater and minimize the need for frequent string replacements, consider the following tips and best practices. Always wind the string in the correct direction, as indicated by the arrows on the spool or cutting head. Winding in the wrong direction is one of the most common causes of feeding problems and can lead to frustrating tangles deep inside the head. Maintain consistent tension while winding to ensure smooth operation and prevent loose coils that can jam during use.

Store extra spools of string in a cool, dry place to prevent moisture absorption, which can weaken the material over time. When trimming, avoid pressing too hard against walls, fences, or other hard surfaces, as this can cause unnecessary wear on the string and reduce its lifespan. Instead, use light pressure and let the rotating string do the work. Regularly inspect the cutting head for debris buildup and clean it after each use to prevent foreign material from interfering with the string feed mechanism. Finally, replace the string before it becomes completely worn out. Running the trimmer with a very short string can strain the motor or engine and lead to more costly repairs down the line.

Common Mistakes to Avoid

Despite the straightforward nature of adding string to a Kobalt weed eater, several common mistakes can lead to poor performance or even damage to the tool. One of the most frequent errors is using the wrong string diameter. Installing a string that is too thick can overload the motor, while one that is too thin may break easily and require constant replacement. Always verify the recommended diameter for your specific model before purchasing new string. Another common mistake is failing to disconnect the power source before beginning the restringing process. Even cordless models can accidentally start if the trigger is engaged, posing a safety risk and potentially damaging the tool.

Incorrect winding direction is another pitfall that can cause the string to tangle or fail to feed properly. Always check for directional arrows on the spool or cutting head and follow them precisely. Neglecting to leave a proper tail length after winding can also result in feeding problems. The tail should extend at least two inches beyond the spool to ensure smooth operation. Additionally, some users rush through the installation process and fail to seat the spool correctly, leading to misalignment and poor performance. Taking the time to follow each step carefully will save you from these preventable issues. (See Also:How To Replace Weed Eater String Stihl)

When to Replace the Entire Head

While restringing your Kobalt weed eater is usually sufficient to restore optimal performance, there are situations where replacing the entire cutting head is the better option. If the head housing is cracked, the spool hub is deformed, or the exit eyelets are severely worn, attempting to restring the head may not resolve underlying mechanical issues. In these cases, investing in a new cutting head assembly can restore your trimmer to full working condition and prevent future problems.

Kobalt offers replacement cutting heads for most of its trimmer models, and many are designed to be easily installed without requiring specialized tools. Before purchasing a replacement head, confirm that it is compatible with your specific model by checking the part number or consulting the manufacturer’s website. Some replacement heads also offer upgraded features such as improved automatic feed mechanisms or enhanced durability, which can provide better long-term value than continuing to repair an aging head.

Maintenance Schedule

Establishing a regular maintenance routine for your Kobalt weed eater can help prevent string-related issues and extend the overall lifespan of the tool. As a general guideline, inspect the cutting head and string after every 5 to 10 hours of use, depending on the intensity of your trimming tasks. If the string appears frayed, uneven, or excessively short, replace it before it causes feeding problems or damages the cutting head. Cleaning the head after each use is also important, as accumulated debris can interfere with the string feed mechanism and lead to premature wear.

In addition to string maintenance, periodically check the motor or engine air filter, spark plug, and battery charge level, as these components can affect overall trimmer performance. Storing the tool in a clean, dry environment when not in use will further protect it from moisture and corrosion. By adhering to a consistent maintenance schedule, you can keep your Kobalt weed eater operating efficiently and reduce the frequency of string-related repairs.

Frequently Asked Questions

How Often Should I Replace the String?

The frequency of string replacement depends on how often you use your Kobalt weed eater and the conditions under which you trim. For light residential use, a single string replacement every few months may be sufficient. Heavy-duty trimming around driveways, sidewalks, or thick vegetation can cause the string to wear down more quickly, necessitating replacement every few weeks. Always monitor the string length and condition during use, and replace it whenever it becomes too short or begins to fray excessively.

Can I Use Any Type of Trimmer String?

While many types of trimmer string are compatible with Kobalt weed eaters, it is best to use string that matches the manufacturer’s recommended diameter and material specifications. Using an incompatible string can lead to poor performance, increased wear on internal components, and potential safety hazards. Nylon monofilament and coextruded nylon are the most commonly recommended options for residential models, while heavier-duty applications may benefit from ablation-resistant strings. (See Also:How To String A Troy Bilt Weed Eater)

What Happens If I Overfill the Spool?

Overfilling the spool with too much string can cause tangling, improper feeding, and increased resistance during operation. Excess string can also become tangled inside the cutting head, leading to frustrating jams that require complete disassembly to resolve. Always follow the manufacturer’s guidelines for maximum string capacity and avoid forcing additional string onto the spool beyond its rated limit.

Is It Difficult to Restring a Kobalt Weed Eater?

Restringing a Kobalt weed eater is a straightforward process that most users can complete in under 15 minutes with basic tools. The key is to follow the correct winding direction, maintain even tension, and ensure all components are properly seated. If you encounter difficulties, consulting your owner’s manual or contacting Kobalt customer support can provide additional guidance tailored to your specific model.

Can I Rewind the String Myself or Should I Seek Professional Help?

Rewinding the string yourself is perfectly acceptable and recommended for routine maintenance. However, if you experience persistent feeding problems, unusual noises, or other mechanical issues despite proper restringing, it may be best to consult a professional technician. Continuing to operate a malfunctioning trimmer can lead to more extensive damage and costly repairs.

Conclusion

Learning how to add string to a Kobalt weed eater is a valuable skill that can save you time and money while ensuring your trimmer operates at peak performance. By understanding the different types of string feed systems, selecting the appropriate string material and diameter, and following the correct installation procedure, you can maintain your tool effectively and avoid common pitfalls. Regular inspection and timely replacement of the string will keep your Kobalt weed eater ready for any trimming task, whether you are maintaining a small residential lawn or tackling more challenging garden edges. With practice, restringing becomes a quick and routine maintenance task that enhances the overall efficiency and longevity of your power tool.