These are common. Briggs and Tecumseh both have models with dual shafts. I'm not sure if you can use the 2nd (reverse) shaft or not and you may have to cut it off, because your clutch may not fit properly with it on there. And you may have a hard time, if it's possible at all, fitting a clutch and a pulley on at the same time. But I have seen them used as a generator for lights, by mounting a bicycle lighting kit generator to one. It takes some rigging but it works. Good Luck.