Still running after 38 years. gets new spark plug every year and oil change is done every year best machine our family has owned even my Toro does not compare to the Ariens ST 504 as far as power that Ariens just knocks down high drifts that would stall my Toro. My dad purchased this machine brand new in August 1979 and I kept it when he passed away in August 1996 he always said Ariens made the best.