WW
From my experience they do have some issues in both the Jab and Rotax camps, just like the old Lycs and Conts. But most problems are related to how well they are treated, and when many are RAA or Experimental some issues are due to owners more than they admit.
I have known some Jabs to go thru 4 or 5000 hours, and usual 1000 top end and 2000 complete overhaul, but they are flown often and treated well, so thats what you expect. Rotax often go to 1500, but you might as well buy a new one after that. They are cheap enough to do that.
The weekend warriors who only do 30 hours a year might find condensation and other issues giving more problems.
I have 450 hours in 2.75 years on one and going well.
J
