This is a brand-new Teledyne 4-cylinder air cooled gas engine. It looks kind of like a mini–VW It was used by the military to run generators. The military rated it at 6 hp, but in reality, it is close to 20 hp stock. They are often used in ATVs, air boats and ultra-lights. They are easily modified to make 40 hp. I even saw an ultra-light builder that went hog wild and made 75 hp. Probably not recommended. Comes with military technical manual. $700 OBO or trade
This a link of a guy running one. Mine is still crated. https://www.youtube.com/watch?v=NDd3T4FFdm8