Husqvarna 537249602 Line Trimmer Engine Flywheel Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; 122C This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 5372496-02,5038728-01,5372496-01 Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Husqvarna This engine flywheel (part number 537249602) is for line trimmers The recoil starter engages the flywheel to spin and start the engine