halp

I recently was at an auction and got this motor out of an old plane and I want to know what it is. Its not letting me upload the pictures directly so her is a link: http://imgur.com/a/gZ7N1

Hey guys, My recent project has been converting a Ryobi 31cc wacker engine to put on a SPAD stick. The work on the engine seems to be done, and now I'm tuning all the kinks out of the system. Anyways, I was trying to check what RPM the engine was running at today, and I thought of a smart...