IO540
“Maybe Rotax are even worse”
Do you have any evidence to back up that Rotax 912’s are less reliable than the dinosaurs? According to PFA engineering the 912 range is the most reliable engine in the PFA fleet (2200 aircraft). I can think of lots of reasons why it would be better, like the solid-state ignition.
Agree that the diesels are not doing well, but Rotax have over 100,000 912’s flying and are the largest GA engine manufacturer – on daily output – by far.
Rod1