Rotax 912 uls 100 HP TBO

[catz631]

I sure haven't heard that in the 3 Rotax courses I have attended. In fact at Sebring the instructor,Dean Vogel, told us that the engines showed almost no wear when disassembled at TBO and could probably go longer prior to overhaul.
Of course ,as with all engines, it depends on how long they sit,are treated,maint,etc.
But, I have also heard,as you, (from another source) that the 80 is the better of the two. This I would imagine ,if true, would be because of the lower compression.
In any case,opinions are like a------s.everyone has one.
The 912's have a good track record, I wouldn't worry too much about it
Dick Maddux
Fox 4,912UL

[DesertFox4]

Thanks for the info. Jiott.

My impression of Rotax is they don't "joke" about anything concerning their aircraft engines.
We have local engines that have way more time on them than I do on my 912uls.
My 912uls is now at 800+ hours and there is no way it needs to be torn down for overhaul. I can't tell the difference now from brand new. It starts easily and runs perfect and that is running almost entirely 100LL Av-Gas through it.
Also, no one I've ever talked to that went through Rotax engine classes has brought back that information. We'll certainly hear from some of them soon.

Will the 912uls live up to the stellar reputation that the 912 has earned? We will soon know as there are tons of them in service. My experience says it already has.

[Monocock]

I know of 9 x 912ULS engines that are used daily (and have been for 4 years) that have hit 2500 hours. None have had any more than routine maintenance.

There are loads of people who seem to like slating the "S". It's a great engine and I would buy another. Power to weight, it's stonking!!