Dewalt String Trimmer Problems

Common Dewalt String Trimmer Problems: A Easy Guide

As a professional landscaper, the Dewalt string trimmer is a trusted tool for maintaining the perfect lawn. However, even the most reliable equipment can experience issues over time.

Regarding Dewalt string trimmers, several common problems can arise, causing frustration and potential delays to your work. These issues can range from simple fixes to more complex repairs, but it’s important to identify them early to avoid further damage.

We will explore some of the most common Dewalt string trimmer problems and provide tips on troubleshooting these issues. Whether you’re a professional landscaper or a homeowner looking to maintain your lawn, understanding these problems can save you time, money, and stress.]From line feeding issues to engine problems, we’ll cover it all. So, let’s dive in and explore the common Dewalt string trimmer problems and how to fix them like a pro.

Dewalt String Trimmer Problems

7 Most Common Dewalt String Trimmer Problems & Solutions

Most Common Dewalt String Trimmer Problems & Solutions

The DeWalt String Trimmer is a versatile and powerful tool that is perfect for tackling all of your trimming needs. The DeWalt String trimmer is a popular choice for many homeowners and professionals. However, like any tool, it can encounter some common problems. Here are the 7 most common DeWalt String trimmer problems:

Problematic Starts

Problematic Starts

Difficulty starting the engine is a common issue with DeWalt String trimmers. Problems with the spark plug, fuel filter, or carburetor can cause this. If the trimmer has been idle for long, you may need to replace the stale fuel, which could be the culprit.

Another potential cause of starting problems is a clogged air filter, which restricts airflow to the engine. Regular maintenance, such as cleaning or replacing the air filter, checking spark plug connections, and ensuring the correct fuel mixture, can help prevent starting issues. If you can’t troubleshoot the issue, you may need to seek professional repair or replace some parts.

Ragged Cuts

Ragged Cuts

One issue that users of DeWalt String trimmers may encounter is the problem of ragged cuts on their grass. This can be caused by several factors, including a dull or damaged cutting line, which should be replaced regularly. Another potential cause is an improper technique, such as moving the trimmer too quickly or at an incorrect angle.

It is also important to ensure proper alignment and adjustment of the trimmer head to prevent ragged cuts. If the problem persists, it may be necessary to seek assistance from DeWalt customer support or take the trimmer to a professional for further inspection and repair.


Overheating is common with DeWalt String trimmers, especially when used for extended periods or in hot weather. This can lead to reduced performance and potential damage to the motor. To prevent overheating, giving the trimmer regular breaks is important, and avoiding using it continuously without allowing it to cool down. Regular cleaning to remove built-up debris can also help prevent overheating. If these precautions don’t solve the problem, professional servicing or replacing faulty parts may be necessary.



Stalling is a common problem with DeWalt String trimmers. It can be caused by a clogged air filter, which restricts airflow and affects the engine’s performance. Another possibility is a dirty or clogged fuel filter, which hinders proper fuel flow.

Additionally, a worn spark plug may not ignite the fuel-air mixture correctly, leading to stalling. To resolve this issue, try cleaning or replacing the air and fuel filters, and check the spark plug for any necessary replacements. Also, make sure to adjust and ensure the trimmer’s carburetor is functioning well.


Excessive noise from the DeWalt String string trimmer is a common problem that users may encounter. Various factors, such as worn-out or damaged trimmer motor components, can cause this issue. Another possible cause is a loose or misaligned cutting head.

To address this problem, it is recommended to check and tighten any loose parts and ensure the cutting head is properly aligned. If the noise persists, it is advisable to have the trimmer inspected and repaired by a professional technician. Regular maintenance, including cleaning and lubricating the components, can also help prevent noise-related problems.

Problematic Gears

Problematic Gears

Issues with the gears are a common problem encountered with DeWalt String string trimmers. Over time, these gears may become worn or damaged, decreasing the trimmer’s functionality. This can result in ineffective spinning and cutting.

Regularly inspecting and maintaining the gears is vital to prevent this problem. If any signs of wear or damage are noticed, it may be necessary to replace the gears to restore proper functionality. Additionally, following the manufacturer’s instructions for lubrication can help prevent excessive wear and tear.

Swath Complications

One issue that users may encounter with DeWalt String trimmers is difficulty with the swath, the width of the cutting path. Some users may find that their trimmer is not cutting a wide enough swath, requiring more passes to complete the trimming. This can occur due to a dull or damaged cutting line, which should be replaced regularly.

Another possible cause is improper line installation, so it’s important to ensure the line is correctly threaded through the trimmer head. If the trimmer head isn’t spinning at full speed, obstructions or debris may interfere with its rotation. Using the appropriate line size for your specific DeWalt trimmer model is crucial to achieving the desired cutting path width.

Dewalt String Trimmer Maintenance

Dewalt String Trimmer Maintenance

To maintain your Dewalt String trimmer’s performance, address common issues like the line not advancing properly. This might be due to a worn-out spool or a clogged cutting head. Ensure smooth starts and operation by checking the air filter, carburetor, and fuel.

Consider a faulty battery or charger if the battery isn’t holding a charge. Ensure you have a sharp blade and sufficient power output for optimal cutting. Prevent line breakage by installing it correctly and using high-quality replacements. Avoid motor overheating by allowing cooling periods and avoiding excessive strain.


Dewalt string trimmers are reliable and efficient tools, but like any other machine, they can encounter problems over time. While Dewalt string trimmers are known for their durability and reliability, like any piece of equipment, they may encounter problems.

Common dewalt string trimmer problems include carburetor problems, line feeding issues, and overheating. However, proper maintenance and troubleshooting can easily resolve these problems. By being proactive and caring for your trimmer, you can ensure it serves you well for years. Always follow the manufacturer’s instructions and safety guidelines to prevent potential issues.

Frequently Asked Questions

Why Does My String Trimmer Keep Stopping?

Possible reasons for a string trimmer to keep stopping include a clogged air filter, fuel line, or carburetor. Faulty spark plugs and improper fuel mixtures can also contribute to this issue. Cleaning or replacing these components and using the correct fuel mixture can help resolve the problem.

Why Did My Strimmer Suddenly Stop Working?

There are several possible causes for your strimmer suddenly stopping. It could be due to a depleted battery, faulty power connection, clogged trimmer head, or damaged cutting line. If none of these are the issue, consulting a professional or contacting the manufacturer for assistance is recommended.

How Do I Get More String Out Of My Dewalt Trimmer?

To increase the string on your Dewalt trimmer, firmly tap the trimmer head against the ground. If tapping doesn’t work, try adjusting the trimmer head or replacing the trimmer line. For specific instructions, refer to your Dewalt trimmer’s user manual.

How Do I Get More Line Out Of My String Trimmer?

Tap the trimmer head on the ground while it’s running to release more lines from your string trimmer. This will activate the bump feed system and dispense more line. Ensure you’re using the correct type and size of trimmer line for your specific model. If you’re still having trouble, consult the user manual or contact Dewalt customer support for assistance.

What Should I Do If My Dewalt String Trimmer Is Not Cutting Properly?

If your Dewalt string trimmer is not cutting properly, there are a few steps you can take. Check the cutting line for wear or damage and replace it if necessary. Make sure the trimmer head is properly installed and tightened. Clean any debris or grass clippings from the trimmer head and cutting line. Lastly, adjust the cutting height of the trimmer to ensure it is cutting at the desired level.

Troy D. Harn

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