If your Stihl chainsaw is not starting, it could slow down your work and leave you feeling helpless.
Fortunately, there are several common causes for a Stihl chainsaw not starting, and most of them can be easily fixed with the right tools and some basic knowledge.
In this article, we will go over the most common causes for a Stihl chainsaw not starting and provide step-by-step instructions on how to fix them.
Stihl Chainsaw Not Starting: Likely Causes
There are several possible causes for a Stihl chainsaw not starting. Some of the most common ones include:
A dirty air filter
An air filter is a critical component of a chainsaw’s engine, as it helps to prevent dirt and debris from entering the carburetor and damaging the engine. However, over time, the air filter can become clogged with dirt and debris, which can restrict airflow and prevent the engine from starting. To fix this issue, the air filter must be cleaned or replaced.
A faulty spark plug
The spark plug is responsible for creating the spark that ignites the fuel in the engine, and a faulty spark plug can prevent the chainsaw from starting. A spark plug can become damaged or fouled due to a variety of reasons, such as overheating, improper gap, or the use of low-quality fuel. To fix this issue, the spark plug must be inspected and replaced if necessary.
A lack of fuel
If the chainsaw is out of fuel or the fuel is stale, it will not start. To fix this issue, the fuel tank must be filled with fresh fuel and the fuel cap replaced. It is important to use the correct fuel-to-oil ratio as specified in the chainsaw’s owner’s manual to ensure proper engine performance.
A faulty starter cord
The starter cord is used to pull the starter assembly and initiate the engine’s compression stroke. If the starter cord is damaged or has become stuck, it can prevent the chainsaw from starting. To fix this issue, the starter cord must be inspected and repaired or replaced if necessary.
A damaged starter assembly
If the starter assembly is damaged, it can prevent the chainsaw from starting. The starter assembly consists of several complex components, such as the starter pulley, starter rope, and starter spring, and any damage to these components can prevent the starter assembly from functioning properly. To fix this issue, the starter assembly must be inspected and repaired or replaced if necessary.
Stihl Chainsaw Not Starting: How to Fix
Now that we have covered some of the common causes for a Stihl chainsaw not starting, let’s take a look at how to fix each one:
1. Clean the Air Filter
To clean the air filter on a Stihl chainsaw, follow these steps:
- Locate the air filter cover on the side of the chainsaw.
- Remove the air filter cover by loosening the screws or pressing the locking tabs.
- Take out the air filter and inspect it for dirt or debris.
- If the air filter is dirty, use a small brush or compressed air to remove the dirt and debris.
- If the air filter is severely dirty or damaged, replace it with a new one.
- Reinstall the air filter and air filter cover, making sure to tighten the screws or press the locking tabs securely.
2. Replace the Spark Plug
To replace the spark plug on a Stihl chainsaw, follow these steps:
- Locate the spark plug on the side of the chainsaw.
- Use a spark plug wrench to loosen and remove the spark plug.
- Inspect the spark plug for damage or fouling. If the spark plug is damaged or fouled, replace it with a new one.
- Use the spark plug wrench to tighten the new spark plug to the proper torque specification.
3. Fill the Fuel Tank
To fill the fuel tank on a Stihl chainsaw, follow these steps:
- Locate the fuel tank on the side of the chainsaw.
- Remove the fuel cap and fill the fuel tank with fresh fuel. Be sure to use the correct fuel-to-oil ratio as specified in the chainsaw’s owner’s manual.
- Replace the fuel cap and make sure it is tightened securely.
4. Fix the Starter Cord
To repair a damaged starter cord on a Stihl chainsaw, follow these steps:
- Locate the starter cord on the side of the chainsaw.
- If the cord is frayed or broken, cut off the damaged portion using a pair of scissors.
- Tie a knot at the end of the cord to prevent it from unraveling.
- Pull the starter cord firmly to ensure that it is not stuck or caught on anything.
- If the cord is still not functioning properly, it may need to be replaced. To do this, follow the manufacturer’s instructions for removing and installing a new starter cord.
5. Fix the Starter Assembly
If the starter assembly is damaged and needs to be repaired, it is recommended to take the chainsaw to a certified Stihl dealer or repair shop. The starter assembly is a complex and delicate component and attempting to repair it yourself can be dangerous and may void the chainsaw’s warranty.
In this guide, we have covered the most common causes for a Stihl chainsaw not starting and provided step-by-step instructions on how to fix them. By following these guidelines, you should be able to troubleshoot and repair your Stihl chainsaw and get it running again.
It is always important to check the user manual before trying out any of the repairs. A known fact is to use caution when working on any power tool, and a chainsaw is no exception. If you are unsure of how to repair your chainsaw or feel uncomfortable attempting the repairs yourself, it is recommended to seek the help of a certified Stihl dealer or repair shop.