this is a 60" john deere z520a that has been commercialized. already an estate duty mower, the 27hp kohler engine has been redone with commercial kohler engine parts. completely rebuilt. (the only thing original about the engine is the plastic shrouding) the front wheels have been upgraded to the solid exmark wheels/tires ($250 a piece) these mowers already have the parker hydraulics like the exmarks also. it has been gone through with a fine tooth comb to make sure it is ready to make money reliably. currently sitting with only 895 hrs on it.