Kauer its a single cylinder engine with a very heavy flywheel and an ignition coil and/or magneto. they don’t always fire but the flywheel momentum keeps them turning until it fires again. They run on gas or kerosine and are used for farm equipment. Here is a John Deere. http://www.youtube.com/watch?v=mqARwXJUMhs still want to use one in your Chervrostang 🙄