Why Does My Chainsaw Chain Keep Coming Off?

We may earn commission from qualifying purchases through affiliate links - at no extra cost to you.
Updated in October 2025 | By John

Why Does My Chain Keep Coming Off My Chainsaw

Your chainsaw is a powerful tool, but it can be frustrating when the chain keeps coming off. There are a few common reasons why this might happen, and in this blog post, we’ll discuss them all. We’ll also provide some tips on how to fix the problem so that you can get back to work quickly.

Why Does My Chain Keep Coming Off Chainsaw

There are a few reasons why your chain might keep coming off your chainsaw.

The chain is too loose:
If the chain is too loose, it will be more likely to come off. To tighten the chain, follow the instructions in your chainsaw owner’s manual.

The chain is too tight:
If the chain is too tight, it will be more difficult to operate the chainsaw and the chain may come off. To loosen the chain, follow the instructions in your chainsaw owner’s manual.

The chain is worn out:
If the chain is worn out, it will be more likely to come off. To replace the chain, follow the instructions in your chainsaw owner’s manual.

The bar is bent:
If the bar is bent, it will be more difficult to keep the chain on. To straighten the bar, take your chainsaw to a qualified repair shop.

The chainsaw is not properly maintained:
If your chainsaw is not properly maintained, it will be more likely to have problems, such as the chain coming off. To properly maintain your chainsaw, follow the instructions in your chainsaw owner’s manual.

Why Does My Chain Keep Coming Off My Chainsaw?

A Loose Chain

The most common reason why a chainsaw chain keeps coming off is because it is too loose. To check the tightness of your chain, follow these steps:

1. Turn off the chainsaw and allow it to cool down.
2. Detach the chain from the bar.
3. Use a ruler or tape measure to measure the distance between the top of the chain and the bottom of the bar. The distance should be between 0.025 and 0.03 inches.
4. If the distance is too great, tighten the chain by turning the tensioning screw clockwise.
5. Reattach the chain to the bar and test it to make sure it is properly tightened.

A Bent Chain

Another common reason why a chainsaw chain keeps coming off is because it is bent. To check for a bent chain, follow these steps:

1. Turn off the chainsaw and allow it to cool down.
2. Detach the chain from the bar.
3. Inspect the chain for any bends or kinks. If you find any, straighten the chain by hand or using a chain straightener.
4. Reattach the chain to the bar and test it to make sure it is properly aligned.

A Dull Chain

A dull chain can also cause it to come off the bar. To check the sharpness of your chain, follow these steps:

1. Turn off the chainsaw and allow it to cool down.
2. Detach the chain from the bar.
3. Hold the chain up to a light and inspect the teeth. The teeth should be sharp and evenly spaced.
4. If the teeth are dull, sharpen the chain using a chainsaw file.
5. Reattach the chain to the bar and test it to make sure it is properly sharpened.

A Worn Bar

A worn bar can also cause a chainsaw chain to come off. To check the condition of your bar, follow these steps:

1. Turn off the chainsaw and allow it to cool down.
2. Inspect the bar for any wear or damage. The bar should be smooth and free of gouges or cracks.
3. If the bar is worn, replace it with a new one.

Other Causes

There are a few other possible causes why a chainsaw chain might keep coming off, including:

A damaged chain guide
A damaged chain sprocket
A misaligned chain
A dirty chain
A poorly maintained chainsaw

If you have checked all of the above and your chainsaw chain is still coming off, it is best to take it to a qualified chainsaw repair technician for diagnosis and repair.

Also Read THis: Why Does My Chain Keep Falling Off My Chainsaw

FAQs: Why Does My Chain Keep Coming Off My Chainsaw?

What Causes a Chainsaw Chain to Come Off?

There are a few different reasons why a chainsaw chain might come off. Some of the most common causes include:

Improper tensioning: If the chain is too loose, it will be more likely to come off. Make sure to tighten the chain according to the manufacturer’s instructions.

Dull chain: A dull chain will not grip the wood properly, which can cause it to come off. Sharpen the chain regularly to keep it in good condition.

Damaged chain: A damaged chain can also come off. If the chain is cracked, chipped, or worn out, it should be replaced.

Incorrect sprocket alignment: If the sprockets on the chainsaw are not aligned properly, it can cause the chain to come off. Make sure to align the sprockets according to the manufacturer’s instructions.

Chain oiler problems: If the chain oiler is not working properly, it can cause the chain to become dry and sticky, which can lead to it coming off. Make sure to clean and maintain the chain oiler regularly.

How Can I Prevent My Chainsaw Chain from Coming Off?

There are a few things you can do to prevent your chainsaw chain from coming off:

Tighten the chain properly: Make sure to tighten the chain according to the manufacturer’s instructions.

Sharpen the chain regularly: A sharp chain will grip the wood better and be less likely to come off.

Replace a damaged chain: If the chain is cracked, chipped, or worn out, it should be replaced.

Align the sprockets properly: Make sure to align the sprockets according to the manufacturer’s instructions.

Maintain the chain oiler: Clean and maintain the chain oiler regularly to ensure that it is working properly.

What Should I Do If My Chainsaw Chain Comes Off?

If your chainsaw chain comes off, here are a few things you should do:

Stop the chainsaw immediately: Turn off the engine and remove the spark plug wire to prevent the chainsaw from starting accidentally.

Reattach the chain: Carefully reattach the chain to the chainsaw, making sure that it is properly aligned.

Tighten the chain: Once the chain is reattached, tighten it according to the manufacturer’s instructions.

Inspect the chain: Check the chain for damage, and replace it if necessary.

Align the sprockets: Make sure that the sprockets are properly aligned.

Maintain the chain oiler: Clean and maintain the chain oiler regularly to ensure that it is working properly.

How Can I Keep My Chainsaw Chain in Good Condition?

Here are a few tips for keeping your chainsaw chain in good condition:

Tighten the chain regularly: Make sure to tighten the chain according to the manufacturer’s instructions.

Sharpen the chain regularly: A sharp chain will grip the wood better and be less likely to come off.

Clean and lubricate the chain regularly: Clean the chain with a soft cloth and lubricate it with chainsaw chain oil.

Store the chainsaw in a cool, dry place: Storing the chainsaw in a cool, dry place will help to prevent rust and corrosion.

Inspect the chain regularly: Check the chain for damage, and replace it if necessary.

What Are the Signs of a Bad Chainsaw Chain?

Here are a few signs of a bad chainsaw chain:

The chain is loose or comes off easily.
The chain is dull and does not cut through wood easily.
The chain is damaged or worn out.
The chain oiler is not working properly.

If you notice any of these signs, it is important to replace the chain immediately. A bad chainsaw chain can be dangerous and can lead to accidents.

About The Author

Hi, I’m John, the creator of this site.
With years of hands-on gardening experience, I’m passionate about growing fresh fruits and vegetables and making gardening easy for everyone.
Here, I share tips, ideas, and inspiration to help you enjoy a thriving garden—no matter your skill level!