7 Common Stihl FS 38 Problems: Causes and Solutions

If you are a homeowner who likes to keep their garden or lawn looking neat and tidy, then chances are you have come across the Stihl FS 38 trimmer.

This powerful tool is designed to make yard work easier, but like all equipment, it can develop problems over time.

In this article, we will look at the most common Stihl FS 38 problems, their causes, and how to solve them.

Stihl FS 38 Trimmer Troubleshooting Chart

This table shows the major problems, possible causes, and how to fix the Stihl FS 38 trimmer.

ProblemPossible CausesSolutions
Engine won’t startOld or contaminated fuel, clogged fuel filter, faulty spark plugDrain fuel tank and replace with fresh fuel; clean or replace fuel filter; clean or replace spark plug
Engine runs poorly or stallsDirty carburetor, clogged air filterClean or replace the carburetor; clean or replace the air filter
Engine stallsDirty air filterClean or replace the air filter
Trimmer head doesn’t spinBroken drive cable, worn out clutchReplace the drive cable or clutch
Trimmer line breaks too oftenWrong size trimmer line, worn out trimmer headUse the correct size trimmer line; replace the trimmer head
Trimmer head vibrates excessivelyUnbalanced trimmer head, worn-out clutchBalance trimmer head; replace clutch
Engine is smokingOil leak, clogged air filter, old fuelRepair oil leak; clean or replace air filter; drain the fuel tank and replace with fresh fuel
Engine lacks powerFouled spark plug, dirty air filterClean or replace the spark plug; clean or replace the air filter

How Does the Stihl FS 38 Trimmer Work?

Before we dive into the details of the common problems, it is essential to understand some of the basics of the Stihl FS 38 trimmer.

This tool is powered by a gas engine and has a cutting head that spins a nylon string to trim grass and weeds.

It is easy to use and maintain, but as with any machine, it requires some care to function correctly.

Now, let’s dive into the seven most common problems you may encounter with the Stihl FS 38 trimmer.

7 Common Stihl FS 38 Problems: How to Fix Them

Here are the most common problems you might experience with your Stihl FS 30 trimmer.

Problem #1: The engine won’t start

Cause: The most common reason the engine won’t start is due to old fuel or a clogged carburetor.

Solution: If the engine won’t start, the first thing to check is the fuel. Make sure it is fresh and not stale. If the fuel is old, drain the fuel tank and replace it with fresh fuel.

If the fuel is fresh, check the carburetor. A clogged carburetor can cause the engine not to start. In this case, you will need to clean or replace the carburetor.

Problem #2: The engine stalls

Cause: A dirty air filter can cause the engine to stall.

Solution: Check the air filter and clean or replace it if it is dirty. The air filter prevents dust and debris from entering the engine, and if it becomes clogged, it can reduce airflow and cause the engine to stall.

Problem #3: The trimmer head doesn’t spin

Cause: The trimmer head may not spin if the drive cable is broken or the clutch is worn out.

Solution: Check the drive cable and clutch. If the drive cable is broken, you will need to replace it. If the clutch is worn out, you may also need to replace it.

Problem #4: The trimmer line breaks too often

Cause: The trimmer line may break too often if it is the wrong size or if the trimmer head is worn out.

Solution: Make sure you are using the correct size of trimmer line for your Stihl FS 38 trimmer. If the trimmer head is worn out, replace it.

Problem #5: The trimmer head vibrates excessively

Cause: The trimmer head may vibrate excessively if it is not balanced or if the clutch is worn out.

Solution: Check the trimmer head balance and adjust it if necessary. If the clutch is worn out, you may need to replace it.

Problem #6: The engine is smoking

Cause: A smoking engine can be caused by several things, including an oil leak, a clogged air filter, or old fuel.

Solution: Check for an oil leak and repair it if necessary. Check the air filter and clean or replace it if it is dirty. Drain the fuel tank and replace it with fresh fuel.

Problem #7: The engine lacks power

Cause: The engine may lack power if the spark plug is fouled or the air filter is dirty.

Solution: Check the spark plug and clean or replace it if it is fouled. Check the air filter and clean or replace it if it is dirty.

How to Maintain a Stihl FS 38 Trimmer

It is essential to remember that regular maintenance is necessary to keep your Stihl FS 38 trimmer running smoothly.

Here are a few tips to help you maintain your trimmer:

  • Check the air filter regularly and clean or replace it when necessary.
  • Use fresh fuel and store it in a clean, dry, and well-ventilated area.
  • Check the spark plug regularly and clean or replace it when necessary.
  • Inspect the trimmer head and trimmer line for wear and replace them when necessary.
  • Clean the trimmer after each use to prevent debris buildup.

Summary

The Stihl FS 38 trimmer is a powerful tool that can make yard work easier, but like all equipment, it can develop problems over time.

By understanding the common problems and their causes, you can take the necessary steps to solve them and keep your trimmer running smoothly.

Remember to maintain your trimmer regularly and follow the manufacturer’s instructions for use and care.

With proper care, your Stihl FS 38 trimmer can last for many years and provide you with a neat and tidy lawn or garden.

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