John Deere 4039DF diesel engine, naturally aspirated, mechanical fuel system, approx. 70 HP rating, removed from an air compressor in good running condition as pictured. Test ran clean, no smoke or blowby observed, engine holds 70+ lbs oil pressure & runs strong. HARD TO FIND ENGINE — WILL FIT A WIDE VARIETY OF INDUSTRIAL EQUIPMENT — CLEAN CONDITION & A GOOD RUNNER — DON’T MISS IT !! VIDEO: https://www.youtube.com/watch?v=oNCThTH3mpQ