Warranty repairs for damage caused by accidentally hitting small objects

then they may be running afoul of the "fitness for purpose" laws found throughout the world.  ie, an item must be literally fit to use for the purpose for which it is intended.

'Fitness for purpose refers to the standard that must be met by a seller in the course of a business. Generally, when a buyer makes known to a seller the particular purpose for which the goods are bought, there is an implied condition that the goods are reasonably fit for that purpose (customer's requirements, needs, or desires). The principal of fitness for purpose is basic and must be present in the article supplied regardless of the limitations surrounding a sale by sample or by description. [Loomis Bros. Corp. v. Queen, 1958 Pa. Dist. & Cnty. Dec. LEXIS 269, 4-5 (Pa. C.P. 1958)]"

I could quote many more sources, but you all can look the specifics up yourselves.

If I hit some little thing commonly found in lawns, such as a protruding sprinkler head, or small object not visible in the grass and subsequently the mower stopped operating, or operating correctly, and was denied a warranty claim, I suggest you check with your states' attorney general office, or other pertinent legal entity.   EGO should not be allowed to deny claims when one uses their products for their EXPRESS INTENDED PURPOSE.  A mower is used to mow grass.  Grass sometimes has small items within it's boundaries.  The mower should not be rendered unusable by such NORMAL USAGE.