Troubleshooting All STIHL Trimmer Heads Problems

The use of trimmers is an important part of lawn care, and when they malfunction, it can be frustrating. Troubleshooting STIHL trimmer heads is not difficult, and can often be done in a few simple steps. By following the troubleshooting tips outlined in this article, you can quickly and easily identify and correct any STIHL Trimmer Heads Problems.

Brief overview of STIHL trimmer heads

STIHL trimmer heads are a great choice for those looking to get the most out of their lawn care equipment. They offer a wide range of features and benefits, including easy-to-use controls, durable construction, and reliable performance. With proper maintenance and use, STIHL trimmer heads can last for many years without needing to be replaced.

Common Problems and Solutions

STIHL trimmer heads Damaged Clutch


The most common cause of damage to STIHL trimmer heads is a damaged clutch. The clutch is the part of the trimmer that engages and disengages the cutting head from the engine. When this part becomes worn or damaged, it can cause the trimmer head to become stuck in one position and not rotate properly. Additionally, a damaged clutch can also cause the cutting head to vibrate excessively, which can lead to further damage.

Troubleshooting steps:

To troubleshoot this problem, inspect the clutch for any signs of damage or wear. If any damage is visible, replace the clutch with a new one. To check for damage, remove the trimmer head from the machine and inspect it closely. Look for any cracks or chips in the plastic housing that may indicate a problem with the clutch.

Additionally, check for any loose screws or other components that may have come loose due to wear and tear. If anything appears to be out of place, tighten it up and see if that resolves the issue before replacing the entire clutch assembly. If no visible signs of damage are present on the clutch, then you should try cleaning it to ensure there isn’t any debris interfering with its operation.

Use a cloth dampened with warm soapy water to gently clean away dirt and debris from around the shaft of the trimmer head as well as inside its housing. Once cleaned, reassemble your STIHL trimmer head and test it again to see if this resolved your issue.

STIHL trimmer heads Damaged Drive Shaft


The drive shaft is the main component of a STIHL trimmer head, and it can become damaged over time due to wear and tear. The drive shaft connects the motor to the cutting head, and if it is worn or damaged, it will affect the performance of your trimmer head.

Common causes of a damaged drive shaft include: improper lubrication, debris buildup, corrosion, or damage from impacts. In order to prevent this issue, you should regularly inspect and lubricate the drive shaft on your STIHL trimmer head. If you notice any signs of wear or damage, you should replace the part immediately to avoid further damage or malfunction.

Troubleshooting steps:

If your STIHL trimmer head has a damaged drive shaft, the first step is to identify the source of the problem. If you’ve recently used it and noticed that it was making an unusual sound or vibrating more than usual, then this could be indicative of a damaged drive shaft.

To troubleshoot further, you will need to inspect the trimmer head for any visible signs of damage such as cracks or dents in the metal. You should also check for any loose components like screws and nuts that may have come loose over time.

If any of these are present, you should replace them immediately before continuing with any other troubleshooting steps. Once you have identified the source of the problem, it’s important to remove any debris or dirt from around the drive shaft and lubricate it with a light oil. This will help reduce friction and make sure that everything is running smoothly.

After this, you can reattach all components and test out your trimmer head to ensure that it is functioning properly. If there are still issues with your trimmer head after following these steps, then it may be time to consider replacing the entire unit.

STIHL trimmer heads Gearbox Failure


  1. Improper maintenance: Improper maintenance of the trimmer head gearbox can cause it to fail. This can include failure to lubricate the gears regularly and failure to replace worn parts.
  2. Overuse: Overuse of the trimmer head can cause the gearbox to fail due to excessive wear and tear.
  3. Old age: Over time, the plastic gears and other components of the trimmer head gearbox can wear out and fail.
  4. Damage: Damage to the trimmer head gearbox can occur if it is dropped or banged against a hard surface. This can cause the gears to break or become misaligned.

Troubleshooting steps:

If you experience a gearbox failure with your STIHL trimmer head, you should first consult your owner’s manual for any specific instructions on how to repair or replace the damaged gearbox. Depending on the severity of the issue, you may need to take it to a service center for repair or replacement. If the gearbox is beyond repair, you may need to replace the entire trimmer head.

STIHL Trimmer Heads Problems

STIHL trimmer heads Damaged Throttle Cable


STIHL trimmer heads with a damaged throttle cable are dangerous to use, as the trimmer may not respond properly when the throttle is pulled. Without a functioning throttle, the trimmer head could continue to run at full speed, potentially causing serious injury.

Additionally, the trimmer head may not respond at all when the throttle is pulled, making it difficult to control the tool. By replacing the damaged throttle cable, users can ensure that their STIHL trimmer heads are safe and reliable.

Troubleshooting steps:

  1. Check the Throttle Cable for Signs of Damage: Inspect the throttle cable for signs of fraying, kinking, or other damage. If the cable appears to have sustained any kind of damage, it should be replaced immediately.
  2. Check the Throttle Cable Connection: Make sure the throttle cable is properly connected to the throttle handle and the throttle body.
  3. Check the Throttle Handle and Throttle Body for Damage: Inspect the throttle handle and throttle body for any signs of damage or wear.
  4. Replace the Throttle Cable if Necessary: If the throttle cable is found to be damaged or if it has become disconnected, it should be replaced with a new one.
  5. Test the Trimmer: Once the throttle cable has been replaced, test the trimmer to make sure it is operating properly.

STIHL trimmer heads Broken Shaft Housing


If the shaft housing on your STIHL trimmer is broken, the first step is to determine the cause of the break. Common causes of broken shaft housings include impacts from hitting hard objects, wear from prolonged use, or a defective part. Once the cause is identified, you can replace the broken shaft housing with a new one. Depending on the model of trimmer, you may be able to replace the shaft housing yourself, or you may need to take the trimmer to a STIHL service center for repair.

Troubleshooting steps:

  1. Check for damage to the shaft housing. If the shaft housing is cracked or broken, it will need to be replaced.
  2. Inspect the drive shaft for wear or damage. If the drive shaft is worn or damaged, it will need to be replaced.
  3. Inspect the trimmer head for wear or damage. If the trimmer head is worn or damaged, it will need to be replaced.
  4. Check the trimmer head for proper installation. If the trimmer head is not properly installed, it will not function correctly.
  5. Check for debris in the trimmer head. If debris is present, it can cause the trimmer head to malfunction.
  6. Ensure that the trimmer line is properly installed. If the trimmer line is not properly installed, it will not function correctly.

Preventative Maintenance Tips

Importance of regular maintenance to prevent STIHL trimmer heads problems

Regular maintenance of any STIHL trimmer head is important for optimal performance and to avoid problems. Properly maintained trimmer heads can last up to three times longer than those that are not maintained regularly. By regularly inspecting and servicing the trimmer head, you can prevent major problems from occurring and save time and money in the long run.

Recommended maintenance schedule for STIHL trimmer heads

Maintaining your STIHL trimmer head is essential for keeping it in good working order. Regular maintenance helps to prevent problems from occurring and ensures that the trimmer head will last longer. To ensure that your trimmer head works properly, it’s important to follow a recommended maintenance schedule.

  1. First, inspect the trimmer head for any damage or worn parts. If you notice any issues, take time to replace the necessary parts before continuing with regular maintenance.
  2. Next, lubricate all moving parts of the trimmer head according to manufacturer instructions. This will help keep the parts working smoothly and reduce wear and tear on them over time.
  3. Finally, check the tension of the drive belt or chain regularly to make sure it is tight enough to keep the trimmer head in place but not so tight as to cause excessive strain on other components of the machine. If you notice any fraying or wear on the belt or chain, replace it immediately as this can cause serious damage if left unchecked.

By following these simple steps, you can maintain your STIHL trimmer head and prevent major issues down the line. Regularly inspecting and maintaining your equipment will help ensure that your STIHL trimmer head performs optimally for years to come.

Tips for keeping trimmer heads in good working order

Maintaining your STIHL trimmer head is essential for a smooth-running and reliable piece of equipment. Regular maintenance can help to prevent problems from occurring and ensure that your trimmer head continues to work as it should. Here are some tips for troubleshooting all STIHL trimmer heads problems:

  1. First, make sure the fuel tank is full before starting the engine. This will help ensure that the engine is running at peak performance when using the trimmer head. And heck the air filter regularly and replace it when necessary. A clogged or dirty air filter can lead to poor performance and potentially cause damage to the engine.
  2. Second, inspect all moving parts on the trimmer head for any signs of wear or damage. If any parts appear worn out or damaged, they should be replaced immediately to avoid further damage or malfunctioning of the equipment.
  3. Finally, keep an eye on your cutting line. The cutting line should be replaced regularly in order to maintain optimal performance levels from your trimmer head. Be sure to follow manufacturer’s instructions for how often you should replace the cutting line in order to maintain optimal performance from your equipment.

By following these tips and performing regular maintenance on your STIHL trimmer head, you can help ensure that it runs smoothly and reliably for years to come.

STIHL Trimmer Heads Problems


With the help of these troubleshooting tips, you can quickly and conveniently identify and fix any problems you may be having with your STIHL trimmer head. Regular maintenance and thorough cleaning will help keep your trimmer head in top condition, so you can continue to enjoy a perfectly manicured lawn.