Kohler Diesel Air-Cooled KD477-2 954cc EngineAir cooled diesel engines are engineered with state of art air filters to increase durability, and lengthen service intervals. Couple all of that with the engine's cast iron cylinder liners and you've got a machine that doesn't know how to quit. Features New rugged design for the most extreme conditions Equipped with a larger air filtration cartridge with increased capacity Cyclonic separator with one way valve for dust discharge New integrated sound