Regarding the "unknown engine, I will try to get some pictures for the next post. It does not look like the engines in the photos. In the meantime, the engine is a one piece case and the exterior is not smooth like most engines. It has a "sandpaper finish." In addition, the needle valve has a built in flexible spring. It is not an air bleed carburetor. Now you have exhausted my knowledge of the engine.
Thanks for your replies.
Scratch One