How to Replace String on Skil Weed Eater? Beginner’s Tutorial

Introduction

Skil weed eaters are a go-to choice for DIY homeowners and professional landscapers alike, known for their durability and consistent performance for edging, trimming, and clearing overgrown vegetation. Like any power tool, however, they require regular maintenance to keep running at their best – and one of the most common, easiest fixes is replacing the cutting string when it wears out. Many beginners assume they need to buy a brand new weed eater when the string frays or stops feeding, but that’s far from the case. Learning how to replace string on Skil weed eater is a simple, 10 to 15 minute task that costs less than $10 in supplies, and will extend the life of your tool for years. This beginner-friendly tutorial walks you through every step of the process, from gathering the right tools to troubleshooting common issues, so you can tackle this maintenance task confidently, no prior experience required.

• Why Replace Your Skil Weed Eater String?
• What You Need Before Starting
• Safety Precautions First
• Understanding Your Skil Weed Eater Model
• Step-by-Step Guide: How to Replace String on Skil Weed Eater
• Troubleshooting Common Issues After Replacement
• Tips for Extending Your Replacement String Life
• Common Mistakes to Avoid When Replacing String
• Frequently Asked Questions
• Conclusion

Why Replace Your Skil Weed Eater String?

Your Skil weed eater’s cutting string is a wear item, meaning it will gradually degrade with regular use. Knowing the signs that it’s time for a replacement will help you avoid poor performance and unnecessary strain on your tool’s motor. Common signs you need to replace the string include:

• Frayed, split, or visibly worn string, especially at the tips
• String that has worn down to less than 2 to 3 inches in length
• The trimmer won’t feed more string when you bump the cutting head (for bump-feed models)
• Frequent string breakage during normal use, even when cutting thin grass
• Uneven cuts, or the need to pass over the same area multiple times to trim vegetation

Replacing the string regularly does more than just keep your yard looking neat. It reduces strain on the trimmer’s motor, prevents jams in the cutting head, and ensures consistent, efficient cutting performance. For most users, replacing the string every 2 to 3 months for light use, or every 4 to 6 weeks for heavy use, is enough to keep the tool running smoothly. Best of all, learning how to replace string on Skil weed eater eliminates the need to pay for professional maintenance, which can cost $30 or more for a simple string swap.

What You Need Before Starting

Gathering all your supplies before you begin the replacement process will save you time and frustration, and ensure you don’t have to pause mid-task to find a missing tool. Below are the items you’ll need, plus guidance on selecting the right replacement string for your Skil model.

Tools Required

You don’t need any specialized equipment to replace your Skil weed eater string – most of the tools are likely already in your garage. You will need:

• Replacement cutting string: The correct gauge and length for your Skil model (see guidance below for selection tips)
• Work gloves: Protect your hands from sharp string edges and accidental contact with the cutting head
• Safety glasses: Prevent grass clippings, dirt, or broken string from entering your eyes
• Small flathead screwdriver: Helps remove stubborn spools or pry out old, stuck string without damaging the cutting head
• Wire cutters: Cut replacement string to the exact length needed for your model
• Soft cloth or old rag: Wipe away grass clippings and debris from the cutting head
• Small stiff brush (e.g., old toothbrush): Remove caked-on dirt and grass from the spool grooves to prevent jams

Replacement String Selection

Weed eater string comes in a variety of materials, shapes, and thicknesses, and choosing the right one for your Skil model and yard will improve performance and extend the string’s lifespan. The three most common types are round, square (multisided), and twisted heavy-duty string. The table below breaks down their key differences to help you select the best option:

In addition to shape, you’ll need to select the correct string diameter for your Skil model. Most residential Skil weed eaters use 0.080-inch diameter string for light-duty use, while heavy-duty models designed for thicker vegetation use 0.095-inch string. You can find the recommended gauge in your owner’s manual, or by checking the diameter of the existing string on your trimmer’s spool. Using a string that’s too thick will jam the spool and strain the motor, while a string that’s too thin will break easily and fail to cut effectively.

Safety Precautions First

Before you start working on your trimmer, taking a few basic safety steps will prevent accidental injury and damage to your tool. These precautions are non-negotiable, even for experienced users:

1. Disconnect the power source: For gas-powered Skil models, remove the spark plug wire from the spark plug to prevent accidental starting. For cordless models, remove the battery pack from the trimmer. Even if the trimmer’s switch is off, a faulty switch or accidental bump can start the motor, so disconnecting power eliminates this risk entirely.
2. Wear protective gear: Put on safety glasses and work gloves before handling the cutting head or string. Even if you’re careful, small pieces of broken string or flying grass clippings can cause eye injuries or cuts to your hands.
3. Work in a safe area: Choose a well-ventilated, flat workspace away from children, pets, and tripping hazards. If your trimmer was recently used, let it cool down for 10 to 15 minutes before handling the cutting head, as the motor and spool can get hot enough to cause burns.
4. Keep the cutting head away from your body: Never rest the cutting head on your lap or hold it near your face while working. The sharp string edges can cause serious cuts even when the trimmer is turned off.

These steps take less than 2 minutes to complete, and will keep you safe throughout the replacement process.

Understanding Your Skil Weed Eater Model

Skil produces a wide range of weed eater models for different use cases, and the exact replacement process may vary slightly depending on your trimmer’s design. Taking a minute to identify your model type before you start will ensure you follow the correct steps for your tool.

Common Skil Model Types

Most Skil weed eaters fall into one of three categories, based on their string feed mechanism:

• Bump-feed models: The most common residential design, these trimmers have a spring-loaded spool that releases more string when you bump the bottom of the cutting head on the ground. Most Skil GT, ST, and F series models use this design, and it’s the type covered first in the step-by-step guide below.
• Fixed-line models: These trimmers have a static spool with no bump mechanism, so you have to manually pull more string out when it runs short. They are less common for residential use, mostly found on older Skil models or heavy-duty commercial trimmers.
• Rapid-feed models: High-end Skil models designed for professional use, these have a lever on the cutting head that releases string with a squeeze, no bumping required. The replacement process for these models is similar to fixed-line models, with minor adjustments for the feed mechanism.

How to Identify Your Model

To find your model’s specific replacement instructions, recommended string size, and any special requirements, locate the model number printed on a sticker on the lower shaft of the trimmer, or on the bottom of the cutting head. You can also check the original packaging or your owner’s manual for this information. Once you have the model number, you can search for “Skil [model number] string replacement” on Skil’s official website or authorized retailer sites to find model-specific guidance. While most Skil models follow the same basic replacement process, small differences in spool design may require slight adjustments to the steps outlined below.

Step-by-Step Guide: How to Replace String on Skil Weed Eater

Below are the step-by-step instructions for replacing the string on the two most common Skil weed eater models: bump-feed and fixed-line. Follow the steps that match your trimmer’s design for the best results.

For Bump-Feed Skil Weed Eaters

Bump-feed models are the most common Skil design, and the replacement process takes about 10 minutes for beginners. Follow these steps carefully:

1. Disconnect the power source: Remove the battery pack from cordless models, or disconnect the spark plug wire from gas-powered models. This prevents accidental startup during the replacement process.
2. Position the trimmer: Flip the trimmer upside down, resting the cutting head on a flat, stable surface. If your model has a removable cutting head, detach it from the shaft per the instructions in your owner’s manual for easier access to the spool.
3. Locate the string access points: Most Skil bump-feed cutting heads have one or two small circular openings on the bottom, where the string enters and exits the spool. There may also be a small locking tab that holds the spool in place.
4. Remove the old string: Pull any remaining old string out through the access holes. If the string is stuck or frayed, use the flathead screwdriver to gently pry it loose, being careful not to scratch or damage the spool or cutting head. Make sure all remnants of the old string are removed to prevent jams.
5. Clean the spool and cutting head: Use the soft cloth and stiff brush to remove grass clippings, dirt, and debris from the spool grooves and the interior of the cutting head. This ensures the new string feeds smoothly and doesn’t get stuck on caked-on grime.
6. Cut the new string to length: Most Skil bump-feed models require two equal-length pieces of string, each 10 to 12 feet long (check your manual for exact requirements). Cut the string with wire cutters to avoid frayed edges.
7. Feed the string into the spool: Insert one end of the first string piece into one of the access holes, pushing it all the way through the spool until it comes out the opposite side. Leave 2 to 3 inches of string sticking out of the access hole to start.
8. Wind the string onto the spool: Rotate the spool clockwise (the standard direction for most Skil models) to wind the string evenly, making sure it does not overlap or form tangles. Leave the 2 to 3 inch end sticking out of the access hole when you’re done. Repeat this process with the second string piece, feeding it into the opposite access hole and winding it in the same direction.
9. Reassemble the cutting head: If you removed the cutting head from the shaft, reattach it and make sure it clicks or locks into place securely.
10. Test the string feed: Pull both ends of the string gently to confirm they move freely through the access holes. If they stick or feel tight, unwind the spool and rewind the string more loosely to fix tangles or over-tightening.
11. Reconnect the power source: Reattach the battery pack or spark plug wire to restore power to the trimmer.
12. Test the trimmer: Turn the trimmer on in a clear, open area, and bump the cutting head on the ground 2 to 3 times to confirm the string feeds correctly. If the string feeds smoothly, you’re ready to use the trimmer.

For Fixed-Line Skil Weed Eaters

Fixed-line models don’t use a winding spool, so the replacement process is simpler, but requires precise string placement to avoid jams. Follow these steps:

1. Disconnect the power source: Remove the battery or disconnect the spark plug wire, as with bump-feed models.
2. Remove the cutting head: Detach the cutting head from the trimmer shaft per your owner’s manual, and set it on a flat surface.
3. Open the line cover: Locate the line release lever or button on the side of the cutting head, and press it to pop off the line cover.
4. Remove the old string: Pull any remaining old string out of the cutting head, and discard it.
5. Clean the interior: Use the cloth and brush to remove grass, dirt, and debris from the inside of the cutting head, especially around the string eyelets where the string feeds through.
6. Cut the new string: Cut a single piece of replacement string, usually 15 to 20 feet long (check your manual for exact length).
7. Feed the string through the eyelet: Insert one end of the string into the side eyelet of the cutting head, pushing it all the way through until it comes out the opposite side eyelet.
8. Adjust the string length: Pull the string until both ends are equal length, with 6 to 8 inches of string sticking out of each eyelet. This is the optimal length for cutting most vegetation.
9. Close the line cover: Snap the line cover back into place, making sure it clicks securely to prevent it from popping off during use.
10. Reattach the cutting head: Secure the cutting head back to the trimmer shaft, ensuring it is locked in place.
11. Test the feed and trimmer: Pull both ends of the string gently to confirm they move freely through the eyelets. Reconnect the power source, turn on the trimmer, and test it in a safe area to confirm it cuts effectively.

Troubleshooting Common Issues After Replacement

Even if you follow the steps correctly, you may run into minor issues after replacing the string. Below are the most common problems and their quick fixes:

• String won’t feed when bumping the head: First, confirm you wound the string clockwise (for most bump-feed models) – counterclockwise winding will prevent the feed mechanism from working. Next, check for tangles in the spool: disassemble the head and rewind the string neatly if it’s knotted. Finally, ensure the string matches your model’s recommended gauge, as a string that’s too thick will get stuck in the feed holes.
• String breaks immediately after starting: This is almost always caused by winding the string too tightly on the spool, which creates excess tension when the trimmer is running. Rewind the string with a looser tension, leaving a small amount of slack. If the problem persists, you may be using a string that’s too thin for the vegetation you’re cutting – switch to a thicker, more durable type.
• Trimmer vibrates excessively: This happens when the spool is not seated correctly in the cutting head, or the string is wound unevenly, creating an imbalance. Remove the spool, rewind the string evenly, and make sure the spool clicks into place securely.
• Cuts are uneven or leave uncut patches: First, confirm you’re using the right string type for your yard: round string is only suitable for light grass, while square or twisted string is needed for thicker weeds. Also, check that the string is the correct length: 6 to 8 inches extending from the head is optimal for most Skil models. If the string is shorter, it won’t cut effectively; if it’s longer, it will drag and wear down quickly.

Tips for Extending Your Replacement String Life

With proper care, your replacement string can last 2 to 3 times longer than it would with neglect. Follow these tips to get the most out of your new string:

• Only bump the cutting head on soft surfaces like grass or dirt when feeding string. Bumping on concrete, rocks, or pavement frays the string ends and causes them to break quickly.
• Choose the right string type for your yard: round string is sufficient for light edging and thin grass, while square or twisted string is better for thick weeds and overgrown areas.
• Wind the string evenly on the spool, without overlapping or leaving gaps. Uneven winding causes tangles and puts stress on the string, leading to premature breakage.
• Don’t overfill the spool: most Skil models have a fill line marked inside the spool. Filling above this line causes the string to rub against the cutting head cover, creating friction that wears down the string fast.
• Clean the cutting head and spool after each use: grass clippings and dirt can get trapped in the spool grooves, causing the string to wear down faster and jam. Wipe the head down with a dry cloth after every use.
• Store your trimmer in a dry, sheltered area: moisture causes the spool to rust, which can snag the string and cause it to break. If you store the trimmer outside, cover the cutting head with a plastic bag to keep it dry.

Common Mistakes to Avoid When Replacing String

Avoiding these common errors will make the string replacement process faster, easier, and safer:

1. Skipping power disconnection: This is the most dangerous mistake beginners make. Even if the trimmer’s switch is off, a faulty switch or accidental contact can start the motor, leading to serious cuts or injuries. Always disconnect the battery or spark plug wire before starting any maintenance.
2. Using the wrong string gauge: A string that’s too thick will jam the spool and strain the motor, potentially causing permanent damage. A string that’s too thin will break constantly and won’t cut effectively. Always check your manual for the recommended gauge before buying replacement string.
3. Winding the string in the wrong direction: Most Skil bump-feed models require clockwise winding to align with the feed mechanism. Winding counterclockwise will prevent the string from feeding when you bump the head, leading to frustration and wasted time.
4. Overfilling the spool: Adding too much string causes it to rub against the cutting head cover, creating friction that wears down the string quickly and causes jams. Stick to the fill line marked inside the spool, or use the length recommended in your manual.
5. Skipping the cleaning step: Old grass, dirt, and debris left in the spool can cause the new string to jam, wear down prematurely, or prevent proper feeding. Spend 2 minutes cleaning the head before installing new string to avoid these issues.
6. Skipping the manual feed test: If you reconnect power and test the trimmer without first pulling the string ends to confirm they move freely, you may break the new string or damage the feed mechanism. Always do a manual feed test before turning the trimmer on.

Frequently Asked Questions

How often should I replace my Skil weed eater string?

The replacement interval depends on how frequently you use your trimmer and the type of vegetation you cut. For light residential use (1 to 2 hours per week, cutting mostly thin grass), you can replace the string every 2 to 3 months. For heavy use (commercial landscaping, large yards with thick weeds and brush), you may need to replace it every 4 to 6 weeks. You’ll know it’s time to replace the string when it becomes frayed, shorter than 2 to 3 inches, won’t feed when you bump the head, or breaks frequently during use. Regular replacement ensures consistent cutting performance and prevents unnecessary strain on your trimmer’s motor.

Can I use any replacement string for my Skil weed eater?

No, you should always use the string gauge recommended in your owner’s manual to avoid damage to your trimmer. Most residential Skil weed eaters use 0.080-inch diameter string for light-duty use, while heavy-duty models use 0.095-inch string. Using a thicker string than recommended can jam the spool, strain the motor, and even cause the cutting head to break. Using a thinner string will break easily and won’t cut through thick vegetation effectively. You can use third-party replacement string as long as it matches the recommended gauge and length for your model.

Why won’t my Skil weed eater string feed after replacement?

There are several common causes for this issue. First, check that you wound the string in the correct direction: most Skil bump-feed models require clockwise winding to align with the feed mechanism. If you wound it counterclockwise, the bump action will pull the string tighter instead of releasing it. Second, check for tangles in the spool: if the string is knotted, it won’t feed through the holes. Disassemble the cutting head and rewind the string neatly to fix this. Third, confirm the string is the correct gauge for your model – a string that’s too thick will get stuck in the feed holes. Finally, check that the feed mechanism inside the cutting head is not jammed with debris; clean it out with a small brush if needed.

Do I need to replace the entire cutting head if the spool is broken?

Not necessarily. Most Skil weed eater models sell replacement spools separately, which are significantly cheaper than a full cutting head assembly. To find a compatible replacement spool, look up your trimmer’s model number (printed on the lower shaft or cutting head) and search for “Skil [model number] replacement spool” on Skil’s official website or authorized retailers. If your model is older and replacement spools are no longer available, you may need to replace the entire cutting head, but this is rare for most modern Skil models.

Is it cheaper to replace the string or buy a new weed eater?

Replacing the string is almost always far cheaper than buying a new weed eater. A spool of replacement string costs between $5 and $18, depending on the type and length, while a new Skil weed eater ranges from $50 for basic corded models to $200+ for high-end cordless commercial models. With proper maintenance, including regular string replacement, your Skil weed eater can last for 5 to 10 years, making string replacement a cost-effective way to keep your tool in good working order.

Can I use my Skil weed eater without the string cover?

No, you should never operate your Skil weed eater without the string cover securely attached. The cover protects you from flying debris, grass clippings, and broken string that can cause serious eye injuries or cuts. It also prevents grass and dirt from getting trapped in the spool, which can cause jams and premature wear on the string. Always reattach the cover and make sure it clicks into place securely after replacing the string or performing any maintenance on the cutting head.

Conclusion

Replacing the string on your Skil weed eater is a simple, low-cost maintenance task that every owner can learn to do, even if you have no prior experience with power tool upkeep. By gathering the right supplies, following basic safety precautions, and using the correct string for your model, you can complete the replacement in 10 to 15 minutes without paying for professional help. This tutorial covered the full process, from identifying your Skil model type to step-by-step instructions for both bump-feed and fixed-line trimmers, plus troubleshooting tips for common issues and best practices to extend the life of your replacement string. Avoiding common mistakes like skipping power disconnection or using the wrong string gauge will ensure your trimmer runs smoothly and safely for years. Learning how to replace string on Skil weed eater not only saves you money on repairs and full tool replacements, but also gives you more control over your yard maintenance routine. With the guidance in this guide, you’ll be able to handle string replacement quickly and confidently whenever your trimmer’s performance starts to drop, keeping your yard looking neat with minimal effort.