I need help identifying an old motor that belonged to my uncle. Probably hasn't been started in 30 years, but turns easily. Think it might be a Firestone 10-A-1 but there is no id plate on it. I uses a wrap around rope pull for starting. Any information will be appreciated. Also, where to find a manual. Gas tank has a crack, but I remember my uncle starting it in his garage the last time. I want to try to get it running.