How to Replace String in Husqvarna Weed Eater? Easy DIY Guide

Introduction

A dull, frayed, or broken trimmer string is the most common issue homeowners face with their Husqvarna weed eaters, and it’s also one of the easiest fixes you can tackle yourself. Learning How to Replace String in Husqvarna Weed Eater? units will save you the cost of a service visit, keep your tool running at peak performance, and take no more than 10 to 15 minutes of your time. Unlike more complex repairs, this task requires no special mechanical skills, and you won’t need to take your weed eater to a service center. All you need is the right replacement string, a few basic tools, and this comprehensive guide, which covers all Husqvarna models from small residential battery-powered trimmers to large commercial gas-powered units. Whether you’re a first-time DIYer or an experienced yard tool user, this guide will walk you through every step of the process, from choosing the right string to avoiding common mistakes that can damage your tool.

• Understanding Your Husqvarna Weed Eater String
• Types of Husqvarna Replacement String
• Correct String Size for Your Model
• Tools and Materials You’ll Need
• Safety Precautions Before Starting
• Step-by-Step Guide: How to Replace String in Husqvarna Weed Eater
• Replacing String on Bump Feed Models
• Replacing String on Fixed Line Models
• Tips for Extending Your Replacement String’s Life
• Common Mistakes to Avoid When Replacing Your Weed Eater String
• When to Replace the String vs. When to Repair the Weed Eater
• Comparison of Popular Husqvarna Replacement String Types
• Frequently Asked Questions
• How often should I replace my Husqvarna weed eater string?
• Can I use third-party replacement string on my Husqvarna weed eater?
• Why is my new string breaking immediately after replacement?
• Do I need to wear safety gear when replacing the string?
• How much string should extend out of the trimmer head?
• Conclusion

Understanding Your Husqvarna Weed Eater String

Husqvarna designs their weed eaters to work with two primary types of trimmer string, each optimized for different yard work tasks. Choosing the right string for your needs will improve cutting performance, reduce wear on your tool, and extend the life of the string itself. Using the wrong type of string can lead to poor cutting, frequent jams, and even damage to the trimmer head or engine, so it’s important to understand the differences before you make a purchase. Husqvarna’s own branded string is engineered to feed smoothly through their trimmer heads and resist breakage even when cutting thick vegetation, but many high-quality third-party brands offer compatible options at a lower cost.

Types of Husqvarna Replacement String

The two most common types of Husqvarna replacement string are round and serrated. Round string has a smooth, uniform surface and is best suited for light-duty tasks like cutting grass, edging lawns, and trimming small weeds. It creates less friction than serrated string, so it wears down more slowly on soft surfaces like grass and dirt, making it a good choice for regular residential use. Serrated string features tiny, sharp teeth along its length that cut through thick, tough vegetation like brush, weeds, and woody stems much faster than round string. However, the serrations wear down quickly when used on hard surfaces like concrete, rocks, or metal, so it’s best reserved for heavy-duty clearing tasks. Some Husqvarna models also come pre-wound with string, while others require you to cut and wind the string yourself, so check your owner’s manual to see which type you need.

Correct String Size for Your Model

Trimmer string is measured by its diameter, with common sizes including .065 inches (1.65mm), .080 inches (2.03mm), and .095 inches (2.41mm). The correct size for your Husqvarna weed eater is specified in your owner’s manual, and you can also find it printed on the existing string if it’s still intact. Using string that’s too thick for your model will overload the engine, reduce cutting power, and can even damage the trimmer head or drive shaft. Using string that’s too thin will break easily during use and won’t cut through thicker vegetation effectively. If you’re unsure of the correct size, contact Husqvarna customer support or check their website for model-specific recommendations.

Tools and Materials You’ll Need

Replacing the string on your Husqvarna weed eater requires only a few basic, inexpensive tools and materials, most of which you likely already have in your garage. Having everything ready before you start will make the process faster and more efficient.

• Replacement trimmer string: Make sure to purchase string that matches the recommended diameter and type for your specific Husqvarna model. You can buy pre-cut lengths or full rolls, depending on your preference.
• String cutter or sharp scissors: A dedicated trimmer line cutter will give you a clean, straight cut that prevents fraying, but a sharp pair of scissors works just as well for most users.
• Flathead screwdriver: Only required for older Husqvarna models with screw-on trimmer head covers, but useful for prying off stuck retaining rings without damaging plastic parts.
• Work gloves: Thick gloves protect your hands from sharp string edges and accidental cuts while handling the trimmer head.
• Safety glasses: Protect your eyes from flying debris, old string fragments, and grass clippings while working and testing the weed eater.
• Clean rag: Used to wipe away grass, dirt, and old string residue from the trimmer head and spool to ensure smooth operation.
• Optional: Trimmer line lubricant: A small amount of lubricant on the string can reduce friction and extend the life of both the string and the trimmer head.

Safety Precautions Before Starting

While replacing a weed eater string is a low-risk task, taking a few basic safety precautions will prevent injuries and damage to your tool. Follow these steps before you begin any work on your Husqvarna weed eater:

1. Disconnect the power source: For gas-powered models, remove the spark plug wire from the spark plug to prevent accidental starting. For battery-powered or electric models, remove the battery or unplug the tool from the power outlet. Never work on a weed eater while it is connected to a power source, even if it is turned off.
2. Wear protective gear: Put on work gloves and safety glasses before handling the trimmer head or string. Even small pieces of old string or debris can cause serious eye injuries, and sharp string edges can cut your hands easily.
3. Work on a stable surface: Lay the weed eater on a flat, level workbench or the ground to prevent it from tipping over while you work. If you’re working on the ground, choose a clean, dry area free of tripping hazards.
4. Keep children and pets away: Make sure no one else is in the work area while you’re handling the tool and sharp string components.
5. Let hot engines cool: If you’re working on a gas-powered model that was recently used, wait at least 15 minutes for the engine and exhaust to cool down completely to avoid burns.

Step-by-Step Guide: How to Replace String in Husqvarna Weed Eater

The exact process for replacing the string varies slightly depending on whether your Husqvarna weed eater has a bump feed or fixed line trimmer head. Bump feed models are the most common for residential use, and feature an internal spool that holds the string, which feeds out when you bump the head on the ground. Fixed line models are more common for commercial use, and don’t use a spool, instead holding the string directly in the head’s eyelets. Follow the instructions below that match your model type. First, complete these general prep steps that apply to both models:

1. Disconnect the spark plug wire (gas models) or remove the battery (battery/electric models) to prevent accidental starting.
2. Lay the weed eater on a flat surface with the trimmer head facing up.
3. Wipe away any grass, dirt, or debris from the trimmer head with a clean rag to avoid getting dirt in the internal mechanism.

Replacing String on Bump Feed Models

Follow these steps to replace the string on your Husqvarna bump feed weed eater:

1. Remove the trimmer head cover: Most Husqvarna bump feed models have a plastic retaining ring or cap that twists counterclockwise to release. If it’s stuck, use a flathead screwdriver to gently pry it loose, being careful not to crack the plastic. Some models have a small release tab on the side of the head that you need to press before removing the cover.
2. Remove the old string spool: Once the cover is off, pull the spool straight out of the trimmer head. If old string is still attached to the spool, unwind it and discard it.
3. Clean the spool and head: Wipe away any grass, dirt, or old string residue from the spool and the inside of the trimmer head. Buildup of debris can cause the new string to jam or feed unevenly.
4. Wind the new string onto the spool: Most spools have arrows printed on them showing the correct winding direction (almost always clockwise). Wind the string evenly around the spool, leaving about 6 to 8 inches of string sticking out of the feed holes on opposite sides of the spool. Don’t overwind the spool, as this can cause the string to tangle and jam. Leave a small gap between layers of string to ensure smooth feeding.
5. Reinsert the spool into the trimmer head: Align the tabs on the spool with the slots in the trimmer head, then push the spool in until it clicks into place. Make sure it’s seated fully so it doesn’t wobble during use.
6. Thread the string through the feed holes: Pull the loose ends of the string through the eyelets on the trimmer head cover. Make sure the string is not tangled or twisted as you thread it.
7. Reattach the cover: Twist the cover clockwise until it is tight, and give it a gentle twist to make sure it’s fully seated. A loose cover can cause the string to slip out of the feed holes and jam.
8. Test the weed eater: Reconnect the spark plug wire or reinsert the battery, then turn on the weed eater. Let it run for a few seconds, then bump the head on the ground to make sure the string feeds out evenly on both sides. If the string doesn’t feed, turn off the tool and check that the spool is wound in the correct direction and the cover is tight.

Replacing String on Fixed Line Models

Fixed line Husqvarna weed eaters don’t use an internal spool, so the process for replacing the string is a bit different. Follow these steps:

1. Remove the trimmer head: Most fixed line models have a bolt that secures the head to the drive shaft. Use a wrench or screwdriver to loosen the bolt and remove the head. Some models have a quick-release lever that you can flip to remove the head without tools—check your owner’s manual for your specific model.
2. Remove the old string: Pull any remaining old string out of the eyelets on the trimmer head.
3. Clean the head: Wipe away any grass, dirt, or debris from the eyelets and the head body to ensure the new string feeds smoothly.
4. Cut the new string to length: Measure the new string to match the length of the old string (usually 8 to 12 feet, depending on your model), or check your owner’s manual for the recommended length. Cut the string with a trimmer line cutter or sharp scissors to get a clean, straight edge—frayed edges can cause jams and breakage.
5. Thread the string through the eyelets: Insert one end of the string into the first eyelet, push it through until it is even on both sides, then insert the other end into the second eyelet. Many fixed line heads have small notches in the eyelets to hold the string in place while you reattach the head.
6. Reattach the trimmer head: Align the head with the drive shaft, then tighten the bolt or secure the quick-release lever to make sure the head is firmly attached. Give the head a gentle tug to make sure it doesn’t wobble.
7. Test the weed eater: Reconnect the power source, then turn on the weed eater and let it run for a few seconds. Check that the string spins evenly and doesn’t wobble or come loose from the eyelets. If the string is too long, trim it down to 4 to 6 inches on each side for optimal performance.

Tips for Extending Your Replacement String’s Life

With proper care and maintenance, your replacement Husqvarna weed eater string can last for months, even with regular use. Follow these tips to extend the life of your string and reduce the frequency of replacements:

• Avoid cutting near hard surfaces: Concrete, rocks, metal, and other hard surfaces wear down string much faster than grass and dirt. Try to keep your cutting path at least 6 inches away from hard surfaces, and adjust your cutting height if you’re working near sidewalks or driveways.
• Keep the string at the correct length: Most Husqvarna weed eaters perform best with 4 to 6 inches of string extending from each side of the trimmer head. Longer string puts extra strain on the engine, reduces cutting power, and breaks more easily. If your string gets too long from bump feeding, trim it down to the recommended length with a string cutter.
• Use the right string for the job: Reserve serrated string for thick brush and overgrown areas, and use round string for regular lawn maintenance. Switching between string types as needed will reduce unnecessary wear on your string and trimmer head.
• Store string properly: Keep unused replacement string in a cool, dry place away from direct sunlight. UV rays can make the string brittle over time, leading to breakage during use. Avoid storing string in damp areas like garages or sheds where it can absorb moisture and degrade.
• Lubricate the string occasionally: Applying a small amount of trimmer line lubricant to the string every few uses can reduce friction between the string and the trimmer head, extending its life and improving cutting performance.

Common Mistakes to Avoid When Replacing Your Weed Eater String

Even experienced DIYers make mistakes when replacing their weed eater string, which can lead to poor performance, jams, or damage to the tool. Avoid these common errors to ensure your replacement goes smoothly:

• Using the wrong string size: As mentioned earlier, using string that’s too thick or too thin for your model will cause performance issues and damage. Always double-check your owner’s manual for the recommended size before purchasing replacement string.
• Winding the string in the wrong direction: Most Husqvarna spools have arrows indicating the correct winding direction (usually clockwise). Winding the string in the opposite direction will cause it to jam and not feed properly when you bump the head. If you’re unsure of the direction, check the arrows on the old spool or consult your owner’s manual.
• Overwinding the spool: Winding the string too tightly or too many layers will cause it to tangle and jam. Wind it evenly, leaving a small gap between layers, and stop when the spool is about ¾ full. Overfilling the spool is a common cause of feeding issues.
• Forgetting to disconnect the power source: Failing to disconnect the spark plug or remove the battery can lead to accidental starting, which can cause serious injury. Always disconnect the power source before you start any work on the weed eater, even if you think it’s turned off.
• Using frayed or damaged string: Old, brittle, or frayed string breaks easily during use and can damage the trimmer head. Always use new, high-quality replacement string, and discard any string that shows signs of wear before installing it.
• Not tightening the trimmer head cover: A loose cover will cause the string to slip out of the feed holes and jam. After reattaching the cover, give it a gentle twist to make sure it’s fully seated and tight.

If you’ve replaced the string multiple times and it still breaks immediately, or the trimmer head is damaged (cracked, bent, or the spool won’t turn freely), the issue is not with the string, and you may need to repair or replace the trimmer head. Husqvarna sells replacement trimmer heads that are compatible with most of their models, and replacing the head is a simple DIY task. If the engine is sputtering, losing power, or not starting at all after you’ve replaced the string, the issue is likely with the carburetor, spark plug, or fuel system (for gas models) or the battery (for battery models), which require more advanced repair skills.

Comparison of Popular Husqvarna Replacement String Types

Husqvarna offers a wide range of replacement string options designed for different use cases and models. The table below compares the most popular types to help you choose the right one for your needs:

Frequently Asked Questions

How often should I replace my Husqvarna weed eater string?

For most residential users who use their Husqvarna weed eater 1 to 2 times per week for regular lawn maintenance, replacing the string every 2 to 3 months is sufficient. If you use the weed eater more frequently for heavy-duty tasks like clearing thick brush or overgrown areas, you may need to replace the string every 4 to 6 weeks. You should also replace the string immediately if you notice it’s frayed, brittle, shorter than 4 inches, or breaking frequently during use. Regularly inspecting the string before each use will help you catch wear and tear early before it causes bigger performance issues.

Can I use third-party replacement string on my Husqvarna weed eater?

Yes, you can use third-party replacement string on your Husqvarna weed eater as long as it matches the recommended diameter and type for your specific model. Husqvarna’s own branded string is formulated to work optimally with their trimmer heads, but many reputable third-party brands offer high-quality string at a lower cost. Avoid cheap, no-name string, as it’s often made from low-quality materials that break easily and can damage the trimmer head. Always check the string’s specifications to make sure it matches the size and type recommended in your owner’s manual before purchasing.

Why is my new string breaking immediately after replacement?

If your new string breaks immediately after installation, there are three common causes to check. First, confirm that you’re using the correct string diameter for your model—using string that’s too thin will break easily under normal use. Second, inspect the trimmer head for damage, such as cracked eyelets or a bent spool, which can cause the string to snap during operation. Third, check if you’re cutting near hard surfaces like concrete, rocks, or metal, which wear down string very quickly. If you’ve ruled out all these issues, the problem may be with the engine putting too much strain on the string, in which case you should consult a professional repair service.

Do I need to wear safety gear when replacing the string?

Yes, wearing safety gear when replacing your weed eater string is highly recommended, even if you’re an experienced DIYer. The edges of trimmer string are extremely sharp and can cause deep cuts or lacerations to your hands, especially when handling new, unused string. Small pieces of old string, grass clippings, or debris can also fly into your eyes during the process, causing irritation or serious injury. At minimum, wear a pair of thick work gloves and safety glasses to protect yourself from these common hazards.

How much string should extend out of the trimmer head?

For most Husqvarna weed eaters, 4 to 6 inches of string should extend from each side of the trimmer head. This length provides optimal cutting performance without putting unnecessary strain on the engine. If the string is longer than 6 inches, it will reduce cutting power, increase fuel consumption for gas models, and cause the string to break more frequently. If it’s shorter than 4 inches, you’ll have to bump the head more often to feed more string, which can wear out the feed mechanism faster. You can adjust the length by trimming the string with a cutter after testing the weed eater.

Conclusion

Replacing the string on your Husqvarna weed eater is a simple, low-cost DIY task that anyone can complete with basic tools and a small amount of time. By choosing the right string type and size for your model, following the step-by-step instructions for your specific trimmer type (bump feed or fixed line), and avoiding common mistakes, you can keep your weed eater running smoothly all season long. Regular maintenance like replacing the string when needed extends the life of your tool, saves you money on costly repair services, and ensures you get the best possible performance when tackling yard work. The next time your weed eater stops cutting efficiently, you’ll know exactly How to Replace String in Husqvarna Weed Eater? and get back to maintaining your yard in no time.