How to Restring a John Deere Weed Eater? JD Trimmer Reload

Introduction

If you own a John Deere weed eater, you’ve likely relied on its durability and consistent performance to keep your lawn, garden edges, and overgrown areas tidy. Over time, the trimmer line on your JD trimmer will wear down, break, or become too short to use effectively, leaving you with a tool that can’t tackle overgrown grass and weeds. Instead of buying an expensive replacement trimmer head or paying for professional maintenance, learning How to Restring a John Deere Weed Eater? is a simple, cost-effective skill that will save you time and money for years to come.

Restringing a John Deere weed eater takes just 5 to 15 minutes for most residential and commercial models, requires no special tools, and is easy enough for even first-time DIYers to complete safely. This comprehensive guide covers every common John Deere trimmer head type, step-by-step restringing instructions, pro tips to avoid common pitfalls, and answers to frequently asked questions to ensure your JD trimmer reload goes smoothly every time.

• Why Restring Your John Deere Weed Eater?
• Types of John Deere Trimmer Heads
• What You’ll Need to Restring a John Deere Weed Eater
• Step-by-Step: Bump Feed Head Restringing
• Step-by-Step: Fixed-Line Head Restringing
• Step-by-Step: Automatic Trimmer Head Reload
• Tips for Faster, Easier JD Trimmer Reloads
• Common Mistakes to Avoid During Restringing
• When to Restring vs. Replace Your Trimmer Head
• Frequently Asked Questions
• Conclusion

Why Restring Your John Deere Weed Eater?

Many John Deere weed eater owners assume that when their trimmer line runs out, they need to replace the entire trimmer head or even the whole tool. This is a costly and unnecessary expense for most users. Restringing your JD trimmer offers three key benefits that make it the preferred choice for routine maintenance:

• Cost savings: A replacement trimmer head can cost $20 to $50, while a spool of replacement trimmer line costs just $5 to $10. Over the life of your weed eater, restringing instead of replacing the head can save you hundreds of dollars.
• Extended tool life: John Deere weed eaters are built to last for years with proper maintenance. Regular restringing keeps the internal mechanisms of the trimmer head in good working order, preventing wear and tear that comes from using overly worn or damaged line.
• Reduced waste: Throwing away an entire trimmer head every time the line wears out creates unnecessary plastic and metal waste. Restringing is a more sustainable option that keeps usable components out of landfills.

In addition, restringing your weed eater gives you more control over the type of trimmer line you use, so you can select a line thickness and material that’s perfectly suited to your specific trimming needs, whether you’re cutting light residential grass or thick commercial brush. It also gives you a chance to inspect the trimmer head for signs of wear, so you can catch small issues like loose tabs or worn guide holes before they cause larger problems.

Types of John Deere Trimmer Heads

John Deere manufactures weed eaters with three primary types of trimmer heads, each with a slightly different restringing process. Identifying which type of head your model uses is the first step to completing a successful JD trimmer reload. Below is a comparison of the three most common head types to help you identify yours:

Most residential John Deere weed eaters use bump feed or fixed-line heads, while commercial-grade models often feature automatic advancement. If you’re unsure which head your model has, check the owner’s manual or look for a small arrow printed on the side of the trimmer head, which indicates the direction the line should be wound during restringing.

What You’ll Need to Restring a John Deere Weed Eater

Before you start the restringing process, gather these simple tools and materials to ensure you can complete the JD trimmer reload without interruptions:

• Replacement trimmer line (the correct diameter for your model, most residential John Deere weed eaters use 0.080-inch line, while larger commercial models use 0.095-inch line)
• Scissors or a dedicated trimmer line cutter
• Work gloves (to protect your hands from sharp line edges and debris)
• Clean rag or brush (to remove grass and dirt from the trimmer head before disassembly)
• Small flathead screwdriver (only if your model uses a screw to secure the trimmer head to the shaft)

Using the correct diameter trimmer line is critical: line that is too thick will not fit through the head’s guide holes and can strain the trimmer’s motor, while line that is too thin will break easily and wear out quickly. If you’re unsure of the correct line size for your model, check the sticker on the side of the trimmer head or refer to your owner’s manual.

Step-by-Step: Bump Feed Head Restringing

Bump feed heads are the most common type found on residential John Deere weed eaters. Follow these steps to complete a smooth, trouble-free restring:

1. Disconnect the spark plug for safety: Locate the spark plug wire on the side of the trimmer’s engine (for gas-powered models) or unplug the battery (for electric/battery-powered models). Pull the wire free from the spark plug or remove the battery to prevent accidental startup while you work. This is the most important safety step to avoid injury.
2. Remove the trimmer head: Turn the round bottom cap of the bump feed head counterclockwise (left) to loosen it. Once the cap is loose, pull the spool of line straight up and out of the head housing. If the spool is stuck, gently wiggle it side to side to loosen it without damaging the internal components.
3. Clean out debris: Use your rag or brush to remove any built-up grass, dirt, or tangled line from the spool and the inside of the head housing. Debris can cause the line to jam or fail to advance properly if left in place.
4. Cut and prepare the new line: Cut a 3 to 4 foot long piece of replacement trimmer line, which is long enough to wind around the entire spool with extra length for both ends.
5. Insert the line into the spool: Insert one end of the new line into one of the small holes on the side of the spool, pushing it through until it emerges from the other side. Repeat with the other end of the line in the second hole, so both ends are sticking out of opposite sides of the spool.
6. Wind the line around the spool: Look for a small arrow printed on the side of the spool, which indicates the correct winding direction (almost always clockwise for John Deere bump feed heads). Wind each end of the line around the spool in the direction of the arrow, keeping the line tight and evenly spaced as you go. Do not overlap the line, as this will cause tangles and jams. Stop winding when you have 4 to 6 inches of line sticking out of each hole.
7. Reassemble the head: Place the wound spool back into the head housing, making sure the ends of the line stick out through the guide holes on the side of the housing. Turn the bottom cap clockwise (right) to tighten it securely in place. Tug gently on both ends of the line to make sure they are properly seated in the guide holes.
8. Reconnect the power source and test: Reconnect the spark plug wire or reinsert the battery. Turn on the trimmer and test the line advancement by bumping the bottom of the head on the ground while the trimmer is running. The line should advance smoothly with each bump. If it does not, disassemble the head again to check that the line is wound in the correct direction and seated properly in the guide holes.

Step-by-Step: Fixed-Line Head Restringing

Fixed-line trimmer heads use pre-cut segments of line that do not advance automatically, making them ideal for heavy-duty trimming of thick brush and weeds. The restringing process is slightly different from bump feed heads:

1. Disconnect the power source: As with bump feed heads, start by disconnecting the spark plug wire or removing the battery to prevent accidental startup.
2. Remove the spool: Most John Deere fixed-line heads have small release tabs on the sides of the housing. Press these tabs in and pull the spool straight out of the head. If your model uses a screw to secure the head, remove the screw with your small screwdriver before pulling the spool out.
3. Clean the housing and spool: Brush away any grass, dirt, or tangled line from the spool and the inside of the head housing to ensure smooth operation.
4. Cut the replacement line: Cut two equal-length pieces of trimmer line, each 12 to 18 inches long (the diameter of the spool plus 6 inches for most standard John Deere fixed-line heads).
5. Thread the line through the guide holes: Insert one end of each line piece through the small guide eyelet on the side of the head housing, pushing it through until it emerges inside the housing. Make sure the line is seated all the way through the eyelet to prevent it from pulling out during use.
6. Wind the line around the spool: Align the spool with the guide holes, then wind each piece of line around its own section of the spool in the direction of the arrow printed on the spool (usually clockwise). Keep the line tight and evenly spaced, and do not let the two pieces overlap. Stop winding when 6 inches of line is sticking out of each guide eyelet.
7. Reassemble the head: Snap the spool back into the head housing, making sure the line ends stay seated in the guide eyelets. If your model uses a screw to secure the head, tighten the screw back in place. Tug gently on both line ends to confirm they are secure.
8. Test the trimmer: Reconnect the spark plug wire or reinsert the battery, then turn on the trimmer to test the line. The line should be rigid and hold its shape when spinning. If the line is loose or wobbly, disassemble the head to check that you wound it tightly enough and that it is seated correctly in the eyelets.

Step-by-Step: Automatic Trimmer Head Reload

Automatic trimmer heads, found on higher-end and commercial John Deere weed eaters, advance line automatically without requiring you to bump the head. The restringing process is very similar to bump feed heads, with a few small differences:

1. Disconnect the power source: Always start by disconnecting the spark plug wire or removing the battery to avoid accidental injury.
2. Remove the spool: Turn the bottom cap of the automatic head counterclockwise to loosen it, then pull the spool straight up and out of the housing. Some automatic John Deere heads have a small release button on the side of the cap that you need to press while turning to unlock it.
3. Clear debris from the housing: Use a rag or brush to remove any grass, dirt, or old line fragments from the inside of the head housing. Automatic heads have small internal guides that can easily get clogged with debris, so pay extra attention to cleaning these areas.
4. Prepare the new line: Cut a 3 to 4 foot long piece of replacement trimmer line, just as you would for a bump feed head.
5. Insert and wind the line: Insert both ends of the line into the two holes on the spool, then wind the line around the spool in the direction of the arrow printed on the side. Keep the line tight and evenly spaced, and stop winding when 4 to 6 inches of line is sticking out of each hole.
6. Reassemble and test: Place the wound spool back into the housing, making sure the line ends are seated in the guide holes. Turn the bottom cap clockwise to lock it in place. Reconnect the power source and turn on the trimmer: the line should advance automatically as you use it, with no need to bump the head. If the line does not advance, check that you wound it in the correct direction and that the spool is seated properly in the housing.

Tips for Faster, Easier JD Trimmer Reloads

With a few simple tips, you can make the restringing process even quicker and avoid common issues:

• Mark the winding direction on the spool: If the small arrow indicating the correct winding direction is worn off or hard to see, use a permanent marker to draw an arrow on the side of the spool before you remove it. This will eliminate confusion when you’re winding the new line.
• Wind the line tightly but not stretched: Keep the line taut as you wind it around the spool to prevent tangles, but don’t stretch it so tight that it warps the spool or becomes brittle over time.
• Clean the trimmer head every time you restring: Taking 30 seconds to brush out grass and debris from the head housing will prevent jams and extend the life of both the line and the trimmer head.
• Keep spare line on hand: Store a few extra spools of the correct diameter line in your garage or shed so you can restring your weed eater as soon as the line wears out, no last-minute trips to the hardware store required.
• Wear gloves during the process: Trim line has sharp edges that can cut your fingers, especially when you’re pulling it tight through the guide holes. A pair of work gloves will protect your hands from nicks and cuts.
• Store line in a cool, dry place: Nylon trimmer line can become brittle and prone to breaking if stored in direct sunlight or freezing temperatures. Keep spare line in a sealed container in your garage or shed to extend its shelf life.

Common Mistakes to Avoid During Restringing

Even experienced DIYers can make small errors when restringing a weed eater that lead to jams, poor performance, or damage to the trimmer. Avoid these common mistakes to ensure your JD trimmer reload works perfectly every time:

• Winding the line in the wrong direction: This is the most common restringing error. If you wind the line counterclockwise instead of clockwise (or vice versa, depending on your model), the line will not advance properly when you bump the head or use the automatic feed. Always check for the arrow on the spool before winding, and test the line advancement after reassembling the head.
• Overfilling the spool: Winding too much line onto the spool will cause the line to overlap and tangle, leading to jams and poor cutting performance. Stop winding when you have 4 to 6 inches of line sticking out of the guide holes, and do not force extra line onto the spool.
• Using the wrong line diameter: Line that is too thick will not fit through the guide holes and can overheat and damage the trimmer’s motor. Line that is too thin will break easily and wear out in a matter of days. Always use the line size specified in your owner’s manual.
• Skipping the safety step of disconnecting the spark plug: Failing to disconnect the power source before disassembling the trimmer head can lead to accidental startup, which can cause serious injury. Always disconnect the spark plug wire or remove the battery before starting any maintenance on your weed eater.
• Not cleaning debris from the head before restringing: Grass and dirt buildup in the head housing can jam the line advancement mechanism, even if you wind the new line correctly. Take a few seconds to clean out the housing every time you restring to avoid this issue.
• Forcing the spool into the housing: If the spool does not slide easily into the head housing, do not force it. This can break the plastic tabs that hold the spool in place, requiring a full head replacement. Check that the line ends are seated properly in the guide holes and that the spool is aligned correctly before inserting it.

When to Restring vs. Replace Your Trimmer Head

In most cases, restringing your John Deere weed eater is the best option for routine maintenance. However, there are some situations where replacing the entire trimmer head is the better choice:

• The spool is cracked, warped, or broken, so it cannot hold the line securely.
• The line advancement mechanism (the bump feed button or automatic feed gears) is stripped or broken, so the line will not advance even when you bump the head or use the trimmer normally.
• The head housing is cracked or damaged, so it cannot hold the spool securely in place.
• You have restringed the head multiple times and it still jams or fails to advance line, indicating internal damage that cannot be fixed with a new line.

You’ll know it’s time to restring (even if the line is still relatively long) if the line has frayed edges, rough spots, or is prone to breaking during use. Worn line cuts less effectively and can cause the trimmer motor to work harder, leading to reduced performance and shorter tool life. If you’re experiencing any of the issues listed above that require head replacement, a new John Deere trimmer head is widely available at hardware stores, home improvement centers, and online retailers, and most are easy to install with no special tools required.

Frequently Asked Questions

How often should I restring my John Deere weed eater?

The frequency of restringing depends on how often you use your trimmer and the type of vegetation you cut. For light residential use (trimming grass 1 to 2 times per week), you will need to restring your weed eater every 2 to 4 months. If you use your trimmer for heavy-duty tasks like cutting thick brush, weeds, or woody vegetation, you may need to restring it every 2 to 6 weeks. If you notice the line is shorter than 4 inches, breaks frequently during use, or fails to advance when you bump the head, it’s time to restring regardless of how long it’s been since your last replacement.

What size trimmer line does my John Deere weed eater use?

Most residential John Deere weed eaters use 0.080-inch diameter trimmer line, which is a standard size that works well for light to medium grass and weed trimming. Larger commercial-grade John Deere models typically use 0.095-inch line for added durability when cutting thick brush. To confirm the exact line size for your model, check the sticker on the side of the trimmer head or refer to your owner’s manual. Using the wrong line size can cause poor performance, frequent breakage, or damage to the trimmer’s motor. When in doubt, err on the side of slightly thinner line, as it is less likely to damage the trimmer’s motor.

When should I replace the entire trimmer head instead of restringing?

You should replace the entire trimmer head if the spool is cracked or broken, the line advancement mechanism is stripped or non-functional, the head housing is damaged, or you have restringed the head multiple times and it still jams or fails to work properly. For routine line replacement where the head is in good working order, restringing is always the faster, cheaper option. Replacement trimmer heads for John Deere weed eaters are easy to install with no special tools required for most models.

Conclusion

Learning How to Restring a John Deere Weed Eater? is a simple, valuable skill that will save you money, extend the life of your trimmer, and keep your lawn and garden looking neat with minimal effort. Whether your model uses a bump feed, fixed-line, or automatic trimmer head, the restringing process is straightforward and can be completed in minutes with basic tools.

By following the step-by-step instructions in this guide, avoiding common mistakes, and using the tips outlined above, you can complete a successful JD trimmer reload every time your line wears out. Remember to always disconnect the power source before starting maintenance, use the correct line diameter for your model, and clean out debris from the head housing to keep your trimmer running smoothly for years to come.