I also have the problem where my engines wont start. I have watched and followed the tutorial several times now. Any help is wonderful!
Sorry, i did not read the comments above, this is an edited comment. I will probably edit again if nothing from above works.
Another followup, I re downloaded the mod in a fresh install. same results and I did the startup properly. I watched different videos of people in the plane even with the mod.
Startup works fine without engines, after download it just doesn't work.