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Champion spark plug (RCJ6Y). The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.

Champion Spark Plug (RCJ4)

Champion Spark Plug (DJ7Y)

Champion Spark Plug (CJ8)

Spark plug

Dilfr5a-11d spark plug

Spark plug

Champion Spark Plug (CJ6Y)
The spark plug in your Homelite gas-powered chainsaw is essential for the engine to start and run reliably. Your Homelite chainsaw won't start if the spark plug fails to fire. To inspect the chainsaw spark plug, remove it from the spark plug boot and chainsaw. Check the spark plug for any damage or deposits. A spark plug should be replaced if it is no longer in good condition. For further information on troubleshooting and replacing your Homelite chainsaw's spark plug, please check our Homelite Chainsaw Repair Help and Troubleshooting section. This section of the repair manual includes step-by-step instructions and videos for replacing the spark plug on your Homelite chainsaw.
Repair Clinic has a complete online inventory of Homelite gas-powered chainsaw replacement parts. All parts are genuine OEM parts that are designed to fit compatible models. Simply type the model number of your Homelite chainsaw into the search window at the top of this page to find a matching spark plug and other Homelite chainsaw replacement parts. Looking for quick shipping or chainsaw spark plugs near you? Homelite spark plugs are all in stock and available to ship the same day to your door. As a result, Repair Clinic is always close by and ready to deliver the lawn equipment part you need as quickly as possible! Stuck with a repair?
As part of routine chainsaw maintenance, we recommend inspecting your spark plug for damage. A decent rule of thumb is to replace chainsaw spark plugs after 100 hours of use. It is best to replace the spark plug sooner if it is damaged, therefore check the spark plug on your chainsaw as part of periodic maintenance and replace it if there is damage or buildup.
When your Homelite chainsaw spark plug fails, it's usually one of a few common issues. Below are the most important questions homeowners and technicians ask when facing spark plug problems.
Wear from age and heat is the #1 cause. Electrical surges, contamination, and mechanical stress also shorten spark plug life. Regular maintenance and using genuine OEM Homelite parts extend service intervals significantly.
Look for a data plate or label on your Homelite unit — location varies by product type but is typically on the door frame, back panel, or inside the access panel. Enter the full model number in our search to match the exact OEM spark plug for your unit.
Some aftermarket parts work, but genuine OEM Homelite parts support proper fit and performance and guarantee exact fit. Aftermarket alternatives can vary in voltage, dimensions, and durability — OEM is the safer choice for critical parts.


Keep your Homelite chainsaw running efficiently by replacing a faulty spark plug promptly. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. If your Homelite chainsaw spark plug is failing — showing symptoms like reduced performance, unusual noise, or complete non-operation — replacement is typically the fastest fix. Browse our full library of Homelite repair resources for troubleshooting guides and installation videos.
Homelite usually puts the chainsaw model number on a label or plate on the powerhead housing, near the rear handle, or under the top cover. Check these areas after brushing away dirt or sawdust so every letter and number is easy to read. The model number identifies the complete chainsaw, not just the spark plug, and helps narrow our full selection of Homelite chainsaw parts to parts made for your exact unit. Enter the number in the search bar to filter the catalog to your model. Match the complete model number, including letters, numbers, and hyphens, before selecting a part. That means fewer wrong orders and a faster repair.

Regular spark plug replacement keeps your Homelite Chainsaw starting cleanly and running at full power. Repair Clinic stocks OEM spark plugs for a wide range of engines, along with installation videos and gap-setting guides. Use the model number lookup to confirm the exact spark plug specification for your engine, and keep a spare on hand for the next tune-up.