How to clean or replace a chainsaw spark plug

Keeping your Husqvarna chainsaw in top shape means taking care of the spark plug—a small part with a big role.

Cleaning or replacing it regularly ensures better performance and easier starts.

Follow this simple step-by-step guide to clean or change the spark plug on your Husqvarna chainsaw:

Tools you will need:

• Protective gloves
• Wire brush for cleaning
• Combi wrench—or a spark plug tool that fits your chainsaw mode.
• Correct spark plug—check your product’s operator’s manual for the right type and size.

Spark plug maintenance—step by step

Access the spark plug

• Remove the top cover of your chainsaw to expose the spark plug.
• Carefully pull off the cap and wire from the spark plug.

Clean the area

• Check for any dirt, dust or debris around the spark plug.
• Clean the area to prevent dirt from entering the engine.

Inspect the spark plug

• Look for corrosion, cracks or carbon buildup.
• If the plug is dirty but not damaged, clean it using a wire brush.

Remove the spark plug

• Use your combi wrench and turn counterclockwise to loosen and remove the spark plug.

Clean or replace

• If the plug is in good condition, clean the electrode and the contact post with your wire brush.
• If damaged or worn out, replace it with a new spark plug of the correct type.

Reinstall the spark plug

• Carefully thread the plug back into the engine by hand, then tighten with the wrench.
• Do not over-tighten—it just needs to be snug.

Reconnect the cap

• Push the spark plug cap and wire back on until it clocks into place securely.

NOTE: Always use the correct spark plug for your specific Husqvarna chainsaw. You can find this information in the product’s operator’s manual or by visiting your local authorised Husqvarna dealer.