Four replacement spark plugs compatible with Huskee and MTD tiller model 21A332C131 (21A332C131). Designed as a directfit replacement to restore reliable ignition and simplify routine maintenance. Key benefits Reliable starting and steadier idle: Replacing worn or fouled plugs helps improve combustion consistency and reduce misfires. Convenient 4pack: Enough plugs for a full engine tuneup or to keep a spare set on hand for quick field repairs. Easy installation: Directfit design for the listed tiller model reduces installation time and downtime. Built to match model requirements: Manufactured to meet the specification needs of the compatible tiller model for consistent spark and operation. How this solves common problems Resolves hard starts and intermittent engine sputtering caused by old or fouled spark plugs. Prevents decreased engine efficiency from poor combustion, helping equipment run more smoothly during use. Minimizes downtime during peak season by providing a ready supply of replacement plugs. Applications and use scenarios Seasonal maintenance: all four plugs during spring tuneup before planting or landscaping work begins. After storage: Swap out plugs that have become fouled or corroded during offseason storage to ensure reliable starting. Onsite repairs: Keep a pack in a service kit for rental operations, small farms, or landscaping crews to address ignition issues quickly. Notes Confirm correct gap and installation torque per the tiller service manual before use. Compatibility is specific to Huskee and MTD tiller model 21A332C131 (21A332C131).