why does a chain saw not start when it is hot

If you’ve ever tried to start a chain saw when it’s hot outside, you know it can be frustrating. Why doesn’t the saw start? And more importantly, how can you fix the problem? In this blog post, we’ll explore why a chain saw might not start when it’s hot and give you some tips on how to get your saw up and running again. Stay safe out there!


1. Check the fuel mixture.

2. Clean the air filter.

3. Make sure the spark plug is properly gapped and in good condition.

4. Check for carbon build-up on the piston and cylinder.

5. Make sure that the fuel line is not clogged.

6. Check the compression.

7. Check for a loose or damaged flywheel key.

8. Inspect the starter cord for wear and damage.

9. Check the ignition system.

10. Have the saw serviced by a qualified technician.

How can you prevent this from happening?

One way to prevent your chain saw from not starting when it is hot is to wait until it cools down before trying to start it. Another way is to make sure that you are using the correct type of fuel and oil mixture. If you are using the incorrect type of fuel or oil, this can also cause your chain saw not to start when it is hot.

How do you troubleshoot and fix the problem?

The most common reason a chain saw will not start when it is hot is because the spark plug is wet. If the spark plug is wet, it will not create a spark to ignite the fuel in the engine. To determine if the spark plug is wet, remove it from the engine and check for moisture. If the spark plug is wet, dry it off with a rag and try to start the chain saw again.

If the spark plug is not wet, there may be another problem causing the chain saw to not start when it is hot. Check the fuel line for cracks or leaks, and make sure there is enough fuel in the tank. If everything looks good, the air filter may be dirty and need to be cleaned or replaced. Finally, make sure the chain is properly tensioned and the brake is working correctly. If all of these things are in good condition, then there may be a problem with the ignition system and you will need to take the chain saw to a repair shop.

Safety Precautions

One of the most important safety precautions when using a chain saw is to never attempt to start the saw when it is hot. This can be very dangerous, as the engine can easily start up while you are trying to adjust it or clear away debris. Allow the saw to cool down completely before attempting to start it again. This will help ensure safe operation.

What are some possible solutions to get the chain saw running again?

1. Check the fuel mix – if it is too lean, the saw will overheat and shut down. 

2. Clean or replace the air filter – a dirty air filter can restrict airflow and cause the engine to overheat. 

3. Clean the spark plug – a build-up of carbon on the spark plug can prevent it from firing correctly. 

4. Adjust the carburetor – if the carburetor is not set correctly, the engine will run too lean and overheat. 

5. Check for debris in the fuel line – if there is debris in the fuel line, it can clog up the carburetor and cause the engine to overheat. 

6. Check the oil level – if the oil level is low, the engine will overheat. 

7. Check for leaks – if there is a fuel or oil leak, it can cause the engine to overheat. 

8. Let the saw cool down – if the saw has been running for a long time, it may just need to cool down before it will start again. 

What are some reasons a chain saw might not start when it’s hot outside?

One reason a chain saw might not start when it’s hot outside is that the weather has caused the fuel to thicken. This can prevent the engine from igniting properly. Another possibility is that the engine has overheated, causing damage that will need to be repaired before the saw can be used again. Finally, if the chain oil has become too thick, it can prevent the chain from moving, making it difficult or impossible to start the saw.


So, there you have it. The reason a chain saw won’t start when it’s hot is that the fuel has evaporated and left behind an oily residue in the carburetor. This can be remedied by using a stabilizer in your fuel or by running the saw for a minute or two after it has been shut off to allow the engine to cool down. Do you know of any other reasons why a chain saw might not start? Let us know in the comments!


Q 1. Why doesn’t the saw start? 

A. The answer to this question could be related to a few different things. It could be that the fuel has vaporized and isn’t reaching the engine, or it could be that the air filter is dirty and needs to be replaced. In either case, you’ll need to take a look at your saw and see what might be causing the problem.

Q 2. What can I do to fix the problem? 

A. If you think the problem might be with the fuel, try adding some fresh fuel to the tank and see if that helps. If the air filter is dirty, you’ll need to replace it with a new one. Again, consult your chain saw’s manual for more specific instructions.

Q 3. Is it dangerous to use a chain saw when it’s hot outside? 

A. While it’s always important to be careful when using a chain saw, it’s especially important to be cautious in hot weather. Be sure to drink plenty of water and take breaks often to avoid heat exhaustion. Also, be extra careful not to let the saw get too hot, as this could damage the engine.