Last fall I acquired an early 20's Cushman Model-X from my grandfather's estate. For any not familiar with this engine it is an open-crankcase predecessor to the Cushman Cub engines. Updraft lukenheimer carb, headless/sidevalve, etc. I would like more info on this engine as I can't find much in books (even the venerable Gas Engine Encyclopedia). My grandfather rigged up a chain-drive system on the right-side of the engine to operate an old caterpilar magneto which fires the engine at the moment. However, it is lacking in power and i think it is poorly timed (but it does run quite well all day). I'd like information/pictures on the original ignition system, as well as any other tidbits on this odd engine (paint colors, possible dates for the serial number, etc). At the moment it is on a fairly nice home-built cart and is painted a flaking red.