The blower engine sounds like it may have promise. If you can take a picture with the shrouds off maybe someone can come up with better suggestions. I have a Stihl BR 400 Blower engine and would like one or two more. The pull start is on the other end from the prop and I left it on the engine. The magneto flywheel is also fairly small and not as heavy as a saw. A BR48 is likely to be 48cc.

Bill