Morgans wrote:

"Jim Stewart" wrote

It can run at 5800 rpm, but it depends on your
prop pitch. My CTSW never exceeds 5100-5200 on
full throttle climbout and cruises just wonderfully
at 90-95 knots and 4200 rpm or so.

It just sounds wrong to me, to hear an engine running a sustained 5800
RPM. I do want to go 120 knots though, so if that means it has to run
5800 RPM, it is a big turn-off for me.

Just to clarify, the 912 is rated for 5800 rpm for
5 minutes, 5500 continuous.

You know how sometimes people have a hang-up, for no good reason, but
there is a reason?

That is me and Rotax.

We had a SeaDoo that had a rotax (I forgot now) I think around 600 cc
engine. It was a piece of crap, from start to end. You fix one thing,
and there was another problem. Lots of money flushed down into that
hole in the water.

Ended up getting a new short block. Ran it for about a year, with some
improvement in reliability, but not much. I got it running fairly good
and sold it. I told the new buyers about its questionable reliability
(so I could sleep nights), but they still wanted it. It was a deal.

All I can add is that 2 strokes are 2 strokes
and 4 strokes are 4 strokes. I'd never be
comfortable being pulled through the air with
a 2 stroke unless I had a chute and a place to
make an emergency landing.

Now, I KNOW that the 912 is a completely different beast than that 586
(or whatever) 2 stroke, but I can never imagine getting into a plane
with an engine that is made by the same company. Not logical, but just
the same, my mind is over ruling my brain! or something like that

Well, your attitude is justified. I like the
912. Behaves like a big electric motor for me.