Why Does My Chainsaw Stop Cutting & How to Fix?

Ever been in the middle of a project and suddenly your trusty chainsaw just stopped cutting? There could be a few reasons behind this hiccup. 

Firstly, the chain might not have the right tension. If that adjustment screw is too loose, the chain won’t make proper contact with the wood.

On the flip side, an overly tight chain might not rotate at the right speed, leading to inefficient cutting. And let’s not forget the possibility of a dull chain or issues with the rakers taking too big a bite. 

We’re here to dive deep into each of these issues and help you get that chainsaw back in action.

Why Does My Chainsaw Stop Cutting? [Explained]

1. Dull Chainsaw Blade of chainsaw

One of the most common reasons why a chainsaw stops cutting is a dull blade. Over time, the edge of the chainsaw can become dull, making it difficult to cut through wood.

If your chainsaw takes longer than usual to cut through wood or produce smaller chips, it may be time to sharpen the blade.

To sharpen a chainsaw blade, you will need a round file, a file guide, and a flat file. Start by securing the chainsaw in a vice so it doesn’t move around while you are working. Then, insert the round file into the file guide and place it on the blade.

Read more: Why does my chainsaw chain dull so quickly?

Use the file guide to keep the file at the correct angle and apply pressure as you move the file along the edge.

Follow the manufacturer’s recommendations for your chainsaw’s correct file size and angle. Once you have finished filling one tooth, rotate the chainsaw to point to the next tooth. Repeat this process until all of the teeth have been filed.

If you don’t feel comfortable sharpening the blade yourself, you can take it to a professional or purchase a new chain altogether.

2. Dirty Air Filter of chainsaw

Another common reason why a chainsaw may stop cutting is a dirty air filter. The air filter on a chainsaw prevents dirt and debris from entering the engine and can become clogged over time.

When the air filter becomes clogged, it restricts the airflow to the engine, which can cause the chainsaw to stall.

To clean the air filter:

Remove it from the chainsaw and tap it gently to remove any loose debris.
Wash the filter in warm, soapy water and rinse it thoroughly.
Allow the filter to air dry before reinstalling it.

3. Loose or Damaged Spark Plug of chainsaw

A loose or damaged spark plug may also cause a chainsaw that stop cutting. The spark plug provides the spark that ignites the fuel in the engine and powers the chainsaw.

If the spark plug is loose or damaged, it can cause the engine to misfire or not start at all.

To check the spark plug, remove it from the engine and inspect it for any signs of damage or wear. If the spark plug looks dirty or worn, it may need to be replaced. Use a spark plug wrench to remove the spark plug and install a new one if necessary.

If the spark plug is in good condition but still loose, use the spark plug wrench to tighten it back into place.

4. Clogged Fuel Filter of chainsaw

A clogged fuel filter can also cause a chainsaw to stop cutting. The fuel filter is responsible for filtering out dirt and debris from the fuel before it enters the engine. If the fuel filter becomes clogged, it restricts fuel flow to the engine, which can cause the chainsaw to stall.

To clean the fuel filter

Remove it from the chainsaw and tap it gently to remove any loose debris.
Wash the filter in warm, soapy water and rinse it thoroughly.
Allow the filter to air dry before reinstalling it.

5. Low or Old Fuel of chainsaw

Another common reason why a chainsaw may stop cutting is low or old fuel. Chainsaws run on a mixture of gasoline and oil, and if the fuel is too old or not mixed properly, it can cause the chainsaw to stall or run poorly.

If you are using old fuel, replace it with fresh fuel. Gasoline has a shelf life of about 30 days, so it’s essential to use it before it becomes too old.

If you are still determining the age of the fuel, it’s better to err on the side of caution and replace it with fresh fuel.

Following the manufacturer’s instructions for the correct gasoline and oil ratio is essential when mixing fuel. Too much oil can cause the engine to smoke, and not enough oil can cause the engine to seize.

If you need help with the correct ratio, consult the owner’s manual or the manufacturer for guidance.

If you suspect the fuel is causing the chainsaw to stop cutting, try replacing it with fresh, properly mixed fuel and see if that resolves the issue.

6. Other Possible Causes of Chainsaw

In addition to the causes mentioned above, there are other possible reasons why a chainsaw may stop cutting. These include:

Related: Chainsaw Maintenance Checklist

1. Worn or damaged sprocket – The sprocket drives the chain on the chainsaw. If the sprocket is worn or damaged, it can cause the chain to slip or become loose, which can cause the chainsaw to stop cutting.

2. Dirty carburetor – The carburetor mixes the fuel and air in the engine. If the carburetor becomes dirty or clogged, it can cause the engine to run poorly or stall. read more: How to Clean Chainsaw Carburetor

3. Faulty ignition system – The ignition system provides the spark that ignites the fuel in the engine. If the ignition system is defective, it can cause the engine to misfire or not start.

If you have checked all the above causes and your chainsaw still won’t cut, it may be time to take it to a professional for repair or replacement.

How to Prevent Your Chainsaw from Stopping Cutting?

Using a chainsaw can be dangerous, requiring careful attention and adherence to safety procedures. One of the most critical safety procedures when using a chainsaw is knowing how to stop the saw from cutting when necessary.

Here are some detailed preventive measures you can take to prevent a chainsaw from cutting:

Release the Throttle

If you must stop cutting immediately, release the throttle trigger on your chainsaw. This will cause the chain to stop spinning almost instantly. Remove the throttle with your finger or thumb, depending on your chainsaw type.

Engage the Chain Brake

After releasing the throttle, engage the chain brake to stop the chain from spinning completely. This is an important safety feature that will prevent the chain from accidentally cutting something while you are carrying or storing the chainsaw.

Push the brake handle forward with your left wrist to engage the chain brake. This will cause a metal band to tighten around the clutch drum, stopping the chain from spinning.

Check the Chainsaw

Once you have disengaged the chain, carefully inspect the chainsaw for any damage or signs of wear. Check the chain for any visible damage, and examine the bar for any signs of warping or bending.

If you notice any damage, wait to use the chainsaw until the damage has been repaired or the worn parts have been replaced.

Place the Chainsaw Down Safely

Once you have disengaged the chain and inspected the chainsaw, carefully place the chainsaw on a flat and stable surface. Be sure to set the chainsaw down with the bar and chain pointing away from you and anyone nearby.

By following these preventive measures, you can ensure that you stop your chainsaw safely and prevent any accidents or injuries. It’s important to remember that chainsaws are potent tools that require careful handling and attention to safety procedures to avoid harm.

Frequently Asked Question

Key Takeaway

• Chainsaws can cease cutting due to multiple reasons.
• Regular maintenance is essential.
• Address common issues: dull blade, dirty air filter.
• Ensure proper chain tensioning.
• Prioritize safety and routine checks for optimal performance.