How to Troubleshoot Sparks From a Chainsaw

The spark arrestor is what prevents sparks from flying from your chainsaw.

Sparks emitting from your chainsaw can be scary and dangerous. Sparks may fly if the spark arrestor is not properly attached, is dirty, has gone bad or is completely missing. The sole purpose of a spark arrestor is to prevent spark emissions. It’s a small screen located near the muffler of your chainsaw. Sparks can lead to fire, injury and other dangerous hazards. Discontinue using your chainsaw if you see just one spark, because even a single spark can start a fire or cause injury to yourself or others.

Instructions

1. 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.

2. 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.

3. 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.

4. 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.

Tips & Warnings

• Work on your chainsaw only after the blade is removed and in a well-lit area. Always refer to your owner's manual.

• Do not attempt to troubleshoot or repair your chainsaw while under the influence. Use extreme caution to prevent injury.

References

• ForestWorks.com: Chainsaw Manual
• University of Missouri Extension: G1959 Basic Chainsaw Safety and Use