One of the most important chainsaw safety features is the chain brake, which stops movement of the chain in the event of kickback during operation. The chain brake is activated when the front hand guard, located near the saw’s upper handle, moves rapidly toward the chainsaw operator. When engaged, the chain brake stops the chain from rotating around the saw’s guide bar.

When using a chainsaw, you should always start it with the chain brake engaged so the chain does not move. Check the owner’s manual for your specific model to ensure you understand the operation of the chain brake.

Starting a chainsaw when the motor is cold requires you to open the choke before operation. Typically, this is the fourth position on the chainsaw’s master control lever. By opening the choke, a richer mix of fuel will be supplied to the engine during starting. 

Some chainsaw models use a horizontal squiggle between two clear vertical lines to denote the choke position. 

Here’s how this process works:

• Turn the on/off switch to the "on" position and open the choke. This regulates the air-fuel mix to the engine. 
• Press the fuel primer button several times if your chainsaw model has one until fuel can be seen in the bulb. When pressed, the fuel primer creates a vacuum that draws fuel from the tank and into the carburetor.

• Hold the saw’s upper handle with one hand. Use the other hand to pull up on the start cord. Aim for a quick, smooth stroke.
• Push the choke back in halfway when the engine starts to turn over. Pull the starter cord again. You may need to pull the start cord several times.
• Adjust the choke to the “run” position once the engine is running. 
• Allow the engine to idle for about a minute to get warm. 
• Turn the on/off switch to the “off” position when you’re ready to stop your chainsaw.
• Test the operation of the chain brake just before you’re ready to start cutting. To do this, release the chain brake and allow the chain to turn. Engage the brake and ensure that the chain stops. 

Starting an electric chainsaw requires fewer steps than starting a gas-powered model. However, you’ll still need to follow standard chainsaw safety tips. 

Most corded and cordless electric chainsaws also require pressing a safety lock button in order to make the switch trigger operational and prevent accidental starting. Check your machine’s operation manual for information specific to your model. 

Here’s how to start an electric chainsaw:

• Connect the power cord or the rechargeable battery to the electric chainsaw.
• Place the chainsaw on flat, level ground. Make sure the bar is clear of obstacles and bystanders are at a safe distance.
• Engage the chain brake.
• Engage the safety switch and simultaneously pull the trigger switch to start the chainsaw motor.
• Hold the trigger switch for continued operation.
• Check the functionality of the chain brake to ensure that it works as expected.
• Disengage the chain brake and begin cutting.
• Release to stop the engine. Most electric chainsaws ease to a halt, so you’ll need to stay vigilant when it comes to safety until the unit has fully stopped.