Your right it's not, sorry for the confusion. The first picture is the Mac unit. The one tore down is a John Deere/ Echo 16cc. I wanted to compare it to the bigger ones so I tore down a couple more today. A Mac and an Echo. They look the same. like the one in the first picture. They also have a square fin setup. The 16cc unit has a round fin setup. Actually the one in the first picture I got running. Just needs a diaphram kit in the carb as it doesn't pump too good, the pump check valves are pretty stiff. Is there by chance anything a guy can soak them in the soften them up to keep from buying a kit? I want to mess with these and see how light I can get one down to. I will weigh one at work on the postage scale and let you know. Does anybody already make mufflers for these litttle engines? I will be needing a couple. thanks again for any comments.