Wrong direction for the prop

Re: Wrong direction for the prop

by Rob Seaton » 8 years ago

Rob Seaton

3 1.32k 251

what is your shut-down RPM? maybe it is too high and you have a lot of unburnt fuel causing a dieseling effect?

Re: Wrong direction for the prop

by Willy's » 8 years ago

Willy's

2 7 0

I'll check but normaly About 2000 ..

Re: Wrong direction for the prop

by Peter Kl. » 8 years ago

Peter Kl.

7 230 382

I would be surprised if half a turn did any harm. The engine clearly is not designed to be operated in the opposite direction, that's for sure. Also it is not recommended to manually turn it the opposite direction. One reason for that may be that the oil supply cycle is one way only. And we don't want air bubbles in the oil cycle. But half a turn or even one turn in the wrong direction when stopping the engine completely should do no harm. I am close to guessing here and will follow this thread to see what the experts know from field experience.
Regards
Peter

Re: Wrong direction for the prop

by David HEAL » 8 years ago

David HEAL

23 194 444

Your shut-down RPM seems a bit high. As I recall, ROTAX suggests idling @ 1,800 RPM to stabilize cooling and then shut down one mag and then the next. I can't recall ever having my 912 ULS kick-back during shut-down.

Re: Wrong direction for the prop

by Roger Lee » 8 years ago

Roger Lee

131 5.38k 5.44k

2000 is a tad high for shut down. Try 1650-1700 next time and see if that helps. Also if you can turn one mag off for a few seconds then the second one.

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Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell