How to Troubleshoot Sparks From a Chainsaw

Remove the chainsaw blade. Any time you are working on or examining a chainsaw, it’s wise to remove the blade to prevent accidental injury and cuts.

Locate the spark arrestor -- a small mesh screen near the muffler. The muffler is the part of the chainsaw that helps reduce noise and deflects exhaust gases away from you while operating it.

Inspect the mesh screen. If the screen is dirty and contains carbon deposits, then it must be cleaned. Cleaning the mesh screen is a delicate process, since you do not want to rip or tear it. If you cannot safely remove the carbon deposits without damaging the mesh screen, do not attempt to clean it and put it back on. Check for corrosion, and don't attempt to clean a corroded screen. A screen with corrosion must be replaced.

Replace the clean or new spark arrestor. Ensure that it is properly fitted back into its place. If the spark arrestor is not placed back into your chainsaw correctly, it will not function properly.