Mil surplus 4 cyl air cooled 32 CU utility engine. Very high quality, built by Teledyne/continental. The Army used these to drive pumps, generators, and various other bits of equipment. They were (Army) rated at 6 hp, but are generally considered to produce 16-20 hp. They have been transplanted into Cub Cadet tractors and used to power all manner of equipment.
This one has less than 2 hrs of run time since new. I can start and run it for you.
Please leave your phone number with any reply. I will call you. Sorry if that's an inconvenience, but I need to weed out the bs.