Used Tecumseh 8hp gas engine that originally powered a Coleman Powermaster generator. It still has the generator adapter on it. It has a tapered shaft on it. I had the tank and carburetor cleaned a few years back and then never used it for what I wanted to once I found out I couldnt because of the tapered shaft.
It never had fuel back in it and I have not tried to start it. It is priced accordingly and sold as is. If you want to try and start it prior to buying it then bring your own fuel.