I am working on this engine. I have no experience with Johnsons. When i squeeze the primer bulb I can hear this slight sound of air escaping from this contraption that is the first thing the fuel hits after the QD. It is shaped like a pyramid on the top and rectangular below that. It has 6 screws holding it in. It looks like a gasket around it. There is a circular part in the middles that has a knurled screw holding it on. The gas line coming out looks like it is headed toward the carbuerator. It kind of looks like a filter of some type. I don't see any wires or anything that makes it seem like a fuel pump. I may be missing something. I need a little advice here to get started.