I'm in discussion with a gentleman getting ready to sell an experimental with a Jabiru 3300 engine in it. While talking to him on the phone he fumbled along with which generation Jabiru engine the plane has in it. I've done a decent amount of google searching to see if I could find an answer but most Jabiru 3300 searches result in info about the Gen 4 engine and I'm confident the plane in question won't be a gen 4 engine. Best guess is Gen 1 or 2 from his discussion. Is anyone aware of a resource that will explain the differences between the different generations of the Jabiru 3300 and what, if any updates could have been made over the years?