I am restoring my 416-H with Onan P216 engine. Ran beautifully yesterday. Went out today and would not start. No fuel from the fuel pump. Removed the fuel pump from a running engine still and installed it on the 416. Still no fuel. Tried another working fuel pump. Still not pumping fuel. Took the original pump and put it on another engine. Started right up. I think I have ruled out the fuel pump. I really would like to keep the Onan fuel pump on this tractor. I don't want to put an electric pump on it unless it is absolutely necessary. Engine runs if you gravity feed it.