2400 only recommended for 0-235
0-235 TBO is only recomended at 2400 hours - my last one was removed at 3800 and still going strong, just a couple of top overhauls.
I've heard of 4000 hours+ if rebuild properly and not abused too much.
Just how may hours do Rotax and Jabairu really do? (As opposed to recomened TBO) I'm not knocking them, I've flown behind a Jabby, nice little aircraft and sweet engine, but they are a lot higher stressed than small Lycoming engines. And the Jabbys have had a few engineering issues.