Stihl new OEM Carburetor repair tool 5910-890-4500 Brand New OEM Stihl chainsaw specialty tool for use in repairing carburetors with smaller style limiter caps. This tool is not to be used for deleting EPA required equipment on small engines and doing so may violate federal law and subject the user to criminal penalties. This tool is only to be used in repairing carburetors to proper working order within the confines of the law.