The spark plug ignites the air-fuel mixture inside the engine cylinder — a worn, fouled, or incorrectly gapped plug is one of the most common causes of hard starting, rough idling, misfiring, and reduced engine efficiency in small outdoor power equipment engines.
Using a genuine OEM spark plug ensures the correct heat range, gap specification, and thread pitch for your engine.
Replace this spark plug if you experience: difficulty starting the engine, rough or uneven idling, engine misfiring under load, or noticeable loss of power. Refer to your operator manual for the correct plug gap specification and recommended replacement interval.
Verify your model and serial number to confirm this is the correct plug for your Toro equipment.
