Spark Plugs for Lawn Mowers

Champion

NGK

Stens

Spark plugs are what fires the fuel-air mix in your mower, chainsaw or trimmer engine, and a worn one causes hard starting, misfires and poor fuel use. This range covers common types from Stens, NGK and Champion, including models for Briggs & Stratton, Stihl, Honda and Victa engines.

Plugs differ by thread, heat range and reach, so check what your engine model calls for rather than fitting by brand alone. Some listings include a spark plug cover, and multi-packs are handy if you're maintaining several machines or stocking up for the season.

Frequently asked questions

How do I know which spark plug fits my mower or chainsaw?

Match it to your engine model rather than the equipment brand, as different engines on the same brand of mower can need different plugs. The listing titles reference the engine or model numbers each plug suits.

How do I know if my spark plug needs replacing?

Signs include difficulty starting, rough running or misfires, poor fuel efficiency and a drop in power. A plug that looks black and sooty when removed is usually no longer working properly.

How often should I replace a spark plug?

Most mowers only need one a year, typically at the start of the mowing season or after 25 to 30 hours of use. Machines used heavily may need it changed more often.