How to Replace the String on a FS90R Weed Trimmer: Step-by-Step Guide

how to replace the string on a fs90r weed trimmer

If you’ve ever battled with an overgrown lawn, you know the importance of a reliable weed trimmer. The FS90R Weed Trimmer is a popular choice for homeowners and professionals alike, thanks to its power and versatility. But like any piece of machinery, it will eventually need some maintenance.

One common issue that may arise is the need to replace the string. Now, you might be wondering, “How do I go about doing that?” Well, fear not! In this blog post, we will guide you through the steps to replace the string on your FS90R Weed Trimmer, so you can get back to taming that unruly grass in no time. Whether you’re a seasoned trimmer user or a beginner, this guide will have you covered.

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Weed trimmers are a popular tool for keeping your yard looking neat and tidy. Over time, the string on your fs90r weed trimmer will wear down and need to be replaced. Luckily, replacing the string on this weed trimmer is a relatively simple process.

First, you’ll need to gather the necessary supplies, including a replacement string and a pair of scissors or a knife. Next, you’ll want to locate the string head on your trimmer. This is typically located at the bottom of the trimmer shaft.

Once you’ve located the string head, you’ll need to remove any remaining pieces of string. Then, take your replacement string and thread it through the holes or eyelets on the string head. Make sure to follow the specific instructions for your trimmer model.

Finally, trim the excess string and test out your fs90r weed trimmer to make sure it’s working properly. By following these simple steps, you can easily replace the string on your fs90r weed trimmer and keep your yard looking its best all season long.

Overview of the FS90R Weed Trimmer

FS90R weed trimmer, Overview of the FS90R Weed Trimmer, Introduction

how to replace the string on a fs90r weed trimmer

Importance of Replacing the String

replace the string Prompt: Blog Section h3: “Importance of Replacing the String” Main Sub_heding: “Introduction” Introduction: Have you ever stopped to think about the importance of replacing the string? It may seem like a small and insignificant task, but it actually plays a vital role in many aspects of our daily lives. From household chores to professional endeavors, the string is a common tool that is often taken for granted. In this blog post, we will explore why replacing the string is so important and how it can make a significant impact on our efficiency and safety.

So, let’s unravel the importance of this seemingly simple yet essential act.

Tools and Materials Needed

tools and materials needed

Step-by-Step Guide

So, you’ve got a FS90R weed trimmer and it’s time to replace the string. No worries, I’ve got you covered with a step-by-step guide to make the process a breeze. First, turn off the trimmer and disconnect the spark plug wire.

This is an essential safety step to prevent any accidents while working. Next, locate the trimmer head and remove the cap. Most trimmers have a bump knob on the bottom of the head, so turn it counterclockwise to remove it.

Be careful not to lose any small parts that may come off with the cap. Once the cap and bump knob are removed, you can access the spool that holds the trimmer string. Take note of how the old string is wound around the spool, as this will help when installing the new string.

Remove any remaining bits of the old string from the spool, ensuring it is clean and ready for the new string. Now it’s time to install the new string. Cut a length of trimmer string that is appropriate for your needs and align one end of it with the hole in the spool.

Begin winding the string around the spool, following the same pattern as the old string. Keep the winding tight and even, making sure there are no overlapping or loose areas. Once the string is wound around the spool, thread the end of it through the hole in the trimmer head.

Replace the cap and securely tighten the bump knob by turning it clockwise. Make sure it is tight enough to prevent any movement of the trimmer string. Finally, reconnect the spark plug wire and give the trimmer a test run.

Step 1: Prepare the Trimmer

In order to get your trimmer ready for use, there are a few simple steps you need to follow. First, make sure you have all the necessary tools and materials. You will need a screwdriver, some oil or grease, and a clean cloth.

Once you have gathered everything you need, it’s time to start preparing your trimmer. Start by removing the trimmer’s guard or blade cover. This will allow you to access the cutting blades and clean them properly.

Use your screwdriver to remove any screws holding the guard in place. Set the guard aside in a safe place, as you will need it later. Next, inspect the blades for any signs of damage or wear.

If you notice any chips, cracks, or excessive dullness, it may be time to replace the blades. Otherwise, you can proceed with cleaning and sharpening the blades. Before cleaning the blades, make sure the trimmer is powered off and unplugged.

Use a clean cloth to wipe away any dirt or debris from the blades. It’s important to remove as much buildup as possible, as this can affect the trimmer’s performance. Once the blades are clean, it’s time to lubricate them.

Apply a small amount of oil or grease to the blade surfaces. This will help reduce friction and keep the blades running smoothly. Be sure to follow the manufacturer’s instructions for the type of lubricant to use.

Step 2: Remove the Spool

To remove the spool from your sewing machine, follow these simple steps. First, make sure your machine is turned off and unplugged for safety. Look for a small latch or lever near the top or side of the machine.

This is usually what holds the spool in place. Gently lift or push the latch to release the spool. Next, carefully lift the spool up and out of the machine.

Be sure to hold onto it securely so it doesn’t fall and unravel any thread. Once the spool is removed, you can either replace it with a new spool or thread the machine without using a spool. Just make sure to secure the thread in place so it doesn’t get tangled or caught in the machine.

Removing the spool is an important step in maintaining your sewing machine and ensuring smooth, hassle-free sewing.

Step 3: Measure and Cut the Replacement String

Now that you have removed the old string from your blinds, it’s time to measure and cut the replacement string. This step is crucial in ensuring that the new string fits perfectly and operates smoothly. To start, measure the length of the old string and add a few extra inches to account for any mistakes or adjustments.

It’s better to have a longer string than a shorter one, as you can always trim it down later. Once you have the correct length, use a pair of sharp scissors or a utility knife to cut the string. Be careful not to cut too close to your measured length, as you want to leave room for tying knots or attaching any necessary hardware.

After cutting the string, double-check the length to ensure accuracy before moving on to the next step.

Step 4: Install the Replacement String

Once you have removed the old string from your instrument, it’s time to install the replacement string. This is a crucial step in the process, as it ensures that your instrument will sound its best and be ready to play. To install the replacement string, start by threading one end of the string through the appropriate hole in the bridge or tailpiece, depending on the type of instrument you have.

Then, pull the string through until there is enough slack to thread it through the corresponding tuning peg. Next, tighten the string by turning the tuning peg in the direction that will raise the pitch of the string. Be sure to wind the string neatly around the peg to ensure it stays in place.

Once the string is securely attached to the peg, you can begin tightening it further by turning the peg until the string is taut. Be careful not to overtighten the string, as this could cause it to break. Repeat this process for each string on your instrument, making sure to tune each one as you go.

With the replacement strings installed and tuned, your instrument will be ready to play and sound its best.

Step 5: Reassemble the Trimmer

As we near the end of our step-by-step guide to reassembling your trimmer, it’s time to put everything back together and get ready to start trimming again. This final step will ensure that your trimmer is fully operational and ready to go. Start by carefully placing the cutting head back onto the motor shaft, making sure it fits securely.

Then, reattach any retaining screws or bolts that were removed during the disassembly process. Tighten them firmly, but be careful not to overtighten and risk damaging the trimmer. Finally, reconnect any wires or cables that were disconnected, making sure they are securely attached.

Once everything is back in place, give the trimmer a quick once-over to double-check that nothing is loose or out of alignment. And just like that, you’re done! Your trimmer is now reassembled and ready to tackle your next trimming project.

Maintenance Tips

If you’re looking to replace the string on your FS90R weed trimmer, don’t worry, it’s a relatively simple process. First, make sure you have the right kind of replacement string. The FS90R trimmer uses a specific type of string, typically a .

095 diameter line. Once you have the correct string, turn off the trimmer and disconnect the spark plug wire for safety. Then, locate the spool on the trimmer head and remove any remaining string.

Next, carefully thread the replacement string through the holes or notches on the spool. Make sure to follow the arrows or directional indicators on the spool for proper winding direction. Once the string is threaded, wind it tightly around the spool, leaving a few inches of string unwound.

Finally, secure the loose ends of the string in the notches or holes on the spool, and reassemble the spool onto the trimmer head. With these simple steps, you can easily replace the string on your FS90R weed trimmer and get back to maintaining your lawn with ease.

Regularly Check and Replace Worn-out String

One important maintenance tip for maintaining the quality and performance of your stringed instrument is regularly checking and replacing worn-out strings. Over time, strings can become worn and lose their tone and responsiveness. This can greatly detract from the sound and playability of your instrument.

By regularly checking and replacing worn-out strings, you can ensure that your instrument always sounds its best. Additionally, worn strings can be more prone to breaking, which can be both frustrating and potentially damaging to your instrument. By proactively replacing worn strings, you can avoid any unnecessary downtime or repairs.

So, make it a habit to regularly inspect your strings and replace them when needed to keep your instrument sounding its best.

Clean the Trimmer After Each Use

clean the trimmer, maintenance tips After each use, it is important to clean the trimmer to ensure optimal functionality and prolong its lifespan. Trimmers can quickly accumulate debris and hair clippings, which can hinder the blades from cutting effectively. To clean the trimmer, start by removing any excess hair from the blades using a small brush or toothbrush.

Next, use a cloth or cotton swab dipped in alcohol to wipe down the blades and remove any residual oil or dirt. It is important to be gentle during this process to avoid damaging the blades. After cleaning, make sure to oil the blades to prevent rust and keep them lubricated for smooth operation.

Regularly cleaning and maintaining your trimmer will not only result in a better trimming experience but also extend the life of your device. So, next time you finish using your trimmer, take a few minutes to give it a quick clean. Your trimmer will thank you!


So there you have it, a step-by-step guide on how to replace the string on a FS90R weed trimmer. With a little patience and a few simple tools, you can tackle this task like a pro. And who knows, maybe after mastering this skill, you’ll be dubbed the “String Whisperer” in your neighborhood.

So go forth, my friends, and keep those weeds in check with ease. But remember, with great power comes great responsibility – always wear proper safety equipment and be cautious while operating any power tools. Happy trimming!”


How do I replace the string on a FS90R weed trimmer?
To replace the string on a FS90R weed trimmer, first, turn off the trimmer and disconnect the spark plug wire to ensure safety. Then, remove the trimmer head by unscrewing it from the trimmer shaft. Next, remove any leftover string from the trimmer head and insert the new string following the manufacturer’s instructions. Finally, reattach the trimmer head to the trimmer shaft and reconnect the spark plug wire.

What type of string should I use for a FS90R weed trimmer?
It is recommended to use a high-quality trimmer string that is specifically designed for heavy-duty trimming applications. Look for a string that is compatible with your FS90R weed trimmer model and suits your trimming needs, such as cutting thick grass or weeds.

How often should I replace the string on a FS90R weed trimmer?
The frequency of string replacement depends on the frequency of use and the type of vegetation you are trimming. As a general guideline, you should inspect the string regularly for signs of wear, such as fraying or breakage. If the string is worn out or no longer effectively cutting, it is time to replace it.

Can I use any brand of string on my FS90R weed trimmer?
It is recommended to use the string recommended by the manufacturer or a brand that is compatible with your FS90R weed trimmer model. Using an incompatible string may result in poor trimming performance, string breakage, or even damage to the trimmer itself.

How do I properly wind the string on the trimmer head of a FS90R weed trimmer?
To properly wind the string on the trimmer head, first, remove any leftover string from the trimmer head. Then, follow the manufacturer’s instructions on how to wind the string, considering the specific stringing method recommended for your FS90R weed trimmer model. It is important to ensure that the string is wound tight and even for optimal cutting performance.

What is the recommended length of string for a FS90R weed trimmer?
The recommended length of string can vary depending on the specific trimmer head and your trimming needs. It is best to refer to the manufacturer’s instructions or guidelines for your FS90R weed trimmer model to determine the appropriate length of string to use.

Are there any safety precautions I should take when replacing the string on a FS90R weed trimmer?
Yes, when replacing the string on a FS90R weed trimmer, it is important to follow safety precautions to prevent accidents or injuries. Make sure the trimmer is turned off and the spark plug wire is disconnected. Wear protective gloves and eyewear to protect yourself from debris. Follow the manufacturer’s instructions and guidelines for replacing the string and handling the trimmer.

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