Hello Jacques,
Please check the inside housing of your carburettors. It might be
possible
that small parts from the inside of the aluminium housing of the carbs
get
loose, looking like very small folio. When you increase the power of the
engine you will have more fuel flow through the carbs and these debris
folio
swim up and can close the hole of your jet orifices.
We have had that some years ago on the Demo TriGear from EA/UK. When
Andy
Draper wanted to start and increased the power, the total rpm drop
followed
some second later. To found that out by an ROTAX expert, taking about
three
hours. We assume the reason was Avgas, as the TriGear was getting Avgas
and
Mogas in a mix, depending on the availability.
Good Luck,
Bruno
-----Urspr=FCngliche Nachricht-----
Von: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] Im Auftrag von
ploucandco
Gesendet: Sonntag, 10. Juni 2012 17:31
An: europa-list@matronics.com
Betreff: Europa-List: RPM drop with a 914 above 100%
Hello all,
Recently, I had to about a Take off with my Europa 914 airmaster due to
the
fact that I was facing an RPM drop above 100%. The ROTAX has less than
330
hours.
I already looked at the following items:
- replaced the fuel with fresh one
- fuel pressure is OK
- TCU - transfer function according to heavy maintenance manual and
solenoid
gets 12V above 108%, so should be OK
- turbo wastegate fully closes
- air filter cleaned up
The issue is still and my next step is to look at the carbs (membranes
have
been replaced less than 200 hours ago). Any other ideas? Where should I
specifically need to look at the carbs?
The attached file from the TCU log depicts the issue starting from line
989.
Thanks for relevant input.
Jacques
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