Are you having trouble with your STIHL FS 38 Trimmer? If so, you’re not alone. Unfortunately, this is a common problem with this trimmer, but the good news is that there are ways to fix it. In this article, we’ll go over some of the most common problems people have with their STIHL FS 38 Trimmer and how to fix them.
12 Common STIHL FS 38 Trimmer Problems (causes and solutions)
Problem 1: Engine will not start
The STIHL FS 38 trimmer is a popular and reliable piece of equipment, however, as with any machinery, it can experience issues from time to time. One of the most common problems that users experience is when the engine will not start. If you are having this issue, there are a few things you can do to try and troubleshoot and fix the problem.
- First, check the fuel lines for any blockages or cracks. If there is an obstruction or a break in the line, you will need to replace it before the engine will start. You should also check the spark plug for any signs of damage or corrosion. If it looks worn out or damaged, replace it with a new one.
- Next, make sure that your fuel tank is full and that you have fresh fuel in it. Old fuel can cause problems with starting engines so be sure to use fresh fuel if possible.
- Finally, check all of your connections between the spark plug and ignition coil to make sure they are secure and free from dirt or debris.
Problem 2: Trimmer starts then stalls
The STIHL FS 38 trimmer is a reliable and powerful tool for trimming and edging lawns, but like any other piece of equipment, it can experience problems. One common issue is that the trimmer starts up then stalls shortly after. This can be caused by several different issues, including clogged air filters, bad spark plugs, or an incorrect fuel mixture.
- The first step to resolving this problem is to inspect the air filter. If the filter is clogged or dirty, it will restrict airflow and reduce engine performance. Cleaning or replacing the air filter should resolve this issue.
- Another potential cause of starting then stalling could be a faulty spark plug. Inspect the spark plug for damage or wear and replace if necessary.
- Lastly, check the fuel mixture to make sure it’s correct according to manufacturer specifications; too much oil in the fuel can cause stalling due to an overly rich mixture.
If these steps do not solve the problem, take your STIHL FS38 trimmer to an authorized service center for further diagnosis and repair.
Problem 3: Poor power and performance
The STIHL FS 38 trimmer is a popular choice among homeowners and landscapers alike. Unfortunately, it can sometimes suffer from poor power and performance. This can be caused by several issues, such as an improperly adjusted carburetor, a dirty air filter, or worn spark plugs. Fortunately, these problems are easy to diagnose and fix.
The first step to resolving any power issues with the STIHL FS 38 trimmer is to check the carburetor settings. If the carburetor is not properly adjusted, it can cause the engine to run rich or lean, resulting in poor performance. To adjust the carburetor, you will need a flathead screwdriver and a small adjustable wrench. Once you have these tools, you can follow the instructions in your owner’s manual to make any necessary adjustments.
The next step is to check the air filter for dirt or debris that could be clogging up the system and reducing airflow. If there is dirt present in the filter, you should clean it out using compressed air or a vacuum cleaner with a soft brush attachment. Once cleaned out, reinstall the filter and test again for improved performance.
Finally, if you still experience poor power from your STIHL FS 38 trimmer after adjusting the carburetor and cleaning out the air filter, it may be time to replace your spark plugs. Over time spark plugs wear down due to heat and friction from normal use and eventually need replacing in order to maintain peak performance of your engine.
Problem 4: Hard starting
The STIHL FS 38 trimmer is a great tool for tackling tough weeds and grass in your yard, but it can also be a bit of a headache when it comes to starting. Many users report having difficulty getting the engine to fire up, even after following the manufacturer’s instructions. Fortunately, there are several steps you can take to get your trimmer running smoothly again.
- First and foremost, make sure that you are using fresh fuel with the correct mix of oil. Old or contaminated fuel can cause hard starting issues, so check your fuel lines and tank for any signs of wear or clogging. If necessary, replace the fuel lines and tank before attempting to start the engine again.
- Next, check the spark plug for signs of fouling or damage. If the spark plug is dirty or worn out, replace it with a new one before trying to start the engine again. Also make sure that all connections are tight and secure; loose connections can prevent your trimmer from starting properly as well.
- Finally, if all else fails, try cleaning out the carburetor. This may seem like a daunting task at first, but it’s actually quite simple and can often resolve hard starting issues quickly and easily. Simply remove the carburetor from its housing and use compressed air to blow out any debris that may have built up inside over time.
Problem 5: Smoke and fuel odor
The STIHL FS 38 trimmer is a powerful and reliable tool for keeping your lawn looking neat and tidy. However, some users have reported that the trimmer produces smoke and a strong fuel odor when in use. This can be caused by several different issues, so it’s important to diagnose the problem before attempting to fix it.
The most common cause of smoke and fuel odor from the STIHL FS 38 trimmer is an air leak in the fuel line or carburetor. If there is an air leak, the engine will not be able to draw enough fuel into the combustion chamber, resulting in incomplete combustion which causes smoke and a strong fuel odor. To fix it, inspect all of the fuel lines for cracks or signs of wear and make sure that all connections are tight. You may also need to check the carburetor for any clogs or blockages.
Another possible cause of smoke and fuel odor from the STIHL FS 38 trimmer is an incorrect mixture of oil and gasoline in the tank. If this ratio is off, it can result in incomplete combustion which leads to smoke and a strong fuel odor. To ensure you’re using the right mixture, always refer to your owner’s manual for instructions on how to mix oil and gasoline correctly.
Finally, if your STIHL FS 38 trimmer has been sitting idle for an extended period of time, it’s possible that old gas has become stale or contaminated with water or debris. This can also lead to incomplete combustion which causes smoke and a strong fuel odor. If this is the case, you should drain all of the old gas from your tank and replace it with fresh gasoline before attempting to start your trimmer again.
Problem 6: Stihl FS 38 trimmer Carburetor problems
The STIHL FS 38 trimmer is a lightweight, affordable trimmer that is easy to use. Unfortunately, it can be prone to some common problems. One of the most common issues with the STIHL FS 38 is a clogged or faulty carburetor. The carburetor mixes fuel and air in order to power the engine and if it’s not working properly, then your trimmer won’t be able to run efficiently.
To fix this problem, you will need to clean or replace the carburetor. Cleaning the carburetor can be done by removing it from the trimmer and using a carburetor cleaner spray. If this doesn’t work, then you may need to replace the carburetor entirely. Replacing the carburetor can be done by purchasing a new one from your local STIHL dealer or online retailer. Make sure you get one that is compatible with your model of STIHL FS 38 trimmer.
Once you have replaced or cleaned the carburetor, make sure all other components are in good condition and reassemble everything back together according to instructions provided by STIHL. After reassembling your trimmer, test it out and make sure it runs smoothly before using it again.
Problem 7: Spark plug problems
There are several common causes of spark plug problems on the STIHL FS 38 trimmer. These include:
- Dirty spark plug: A dirty spark plug can prevent the trimmer from starting or cause it to run poorly.
- Incorrect spark plug gap: If the spark plug gap is too wide or too narrow, it can cause misfiring or poor engine performance.
- Faulty spark plug: A faulty spark plug can cause the trimmer to run poorly or even prevent it from starting.
Fortunately, spark plug problems are relatively easy to fix. To fix spark plug problems on the STIHL FS 38 trimmer, you’ll need to:
- Clean the spark plug: Use a wire brush to clean the spark plug and remove any deposits that may be causing it to malfunction.
- Check the spark plug gap: Use a spark plug gap gauge to check the gap and adjust it as needed.
- Replace the spark plug: If the spark plug is faulty or worn out, replace it with a new one.
Problem 8: The engine has too much vibration
The STIHL FS 38 trimmer is a powerful, reliable machine that can help you get your lawn and garden looking great. However, like any other piece of machinery, it can experience problems from time to time. One common problem with the STIHL FS 38 is excessive engine vibration. This can be caused by a number of factors including an improperly adjusted carburetor, worn or damaged spark plug, loose screws or bolts, and even an unbalanced cutting head.
To troubleshoot this issue, first check the carburetor to make sure it is properly adjusted according to the manufacturer’s instructions. If this doesn’t fix the problem, then inspect the spark plug for wear or damage and replace if necessary. Then check all screws and bolts in the engine area to make sure they are tight and secure.
Finally, if none of these steps have solved the problem then you may need to balance the cutting head by adjusting its weight distribution. These simple steps should help you solve any vibration issues with your STIHL FS 38 trimmer quickly and easily.
Problem 9: The trimmer is not cutting evenly
The STIHL FS 38 trimmer is a popular choice for homeowners and professionals alike, but it can have some problems that need to be addressed. One of the most common problems with the FS 38 trimmer is that it does not cut evenly. This can be caused by several factors, including worn out blades, a damaged gearbox, or clogged air filter.
If the blades are worn out, they should be replaced as soon as possible. This will help ensure that the trimmer cuts evenly and efficiently. If the gearbox is damaged, it will need to be replaced with a new one in order to restore optimal performance. Lastly, if there is a clog in the air filter, then it should be cleaned or replaced in order to allow for proper airflow and engine performance.
Problem 10: The trimmer is leaking gasline
The STIHL FS 38 trimmer is a great tool for trimming and edging your lawn, but like all tools, it can have its problems. One of the most common issues with this trimmer is that it may start to leak gasoline from the fuel line. This can be caused by a few different things.
The first thing you should check is if the fuel line is clogged or damaged. If it is, then you will need to replace it. You should also check if the fuel filter is dirty or blocked, as this could be causing the issue as well. Finally, you should make sure that the carburetor is adjusted correctly, as an incorrect adjustment can lead to gas leaking from the fuel line. If all else fails, then you may need to take your trimmer to a professional repair shop for further assistance.
Problem 11: Clogged Spark Arrester
The STIHL FS 38 trimmer is a lightweight, powerful machine that is perfect for both residential and commercial applications. However, like any other machine, it can experience problems from time to time.
One of the most common issues with the STIHL FS 38 trimmer is a clogged spark arrester. A spark arrester is designed to prevent sparks from escaping the engine and igniting combustible materials in the area. If your STIHL FS 38 trimmer’s spark arrester becomes clogged, it can cause the engine to run poorly or even fail to start at all. Fortunately, this problem is relatively easy to fix.
The first step in fixing a clogged spark arrester on your STIHL FS 38 trimmer is to remove it from the engine. This can be done by unscrewing the four screws that hold it in place and carefully lifting it out of its housing. Once you have removed the spark arrester, inspect it for any signs of dirt or debris that could be causing a blockage.
If you find any dirt or debris, use a soft brush or compressed air to clean it off before re-installing it back into its housing. Make sure that all four screws are securely tightened before attempting to start up your trimmer again. If cleaning out the spark arrester does not seem to solve your problem, then you may need to replace it entirely with a new one.
Problem 12: Trimmer Runs rough
The STIHL FS 38 trimmer is a popular and reliable tool for keeping your lawn looking neat and tidy. Unfortunately, like any piece of equipment, it can develop problems from time to time. One common issue you may experience with the STIHL FS 38 trimmer is that it runs rough. This can be caused by a few different things, such as dirty spark plugs, worn-out carburetor parts, or a clogged air filter.
To fix this problem, you will need to do some basic maintenance on the trimmer:
- Start by checking the spark plug and replacing it if necessary. If the spark plug looks clean but still isn’t functioning properly, you may need to adjust the gap between the electrodes or replace it entirely.
- Next, check the carburetor for any worn-out parts and replace them if needed.
- Finally, make sure that the air filter is clean and free of debris so that air can flow freely through the engine. Once all these steps have been taken, start up your trimmer again to see if it runs smoothly. If not, there may be an underlying issue with the engine itself that needs to be addressed by a professional technician.
With the right knowledge and solutions, you can fix your STIHL FS 38 Trimmer and get back to trimming without any problems. Remember to always follow the manufacturer’s instructions when fixing any trimmer, and if the problem persists, take it to a professional. With the tips mentioned in this article, you should be able to get your trimmer back to working order in no time.