On the other hand, there are many Rotax engines flying fine every day
with E10. Rotax itself has said it is OK for the 900 series engines.
For the standard Europa-supplied tank, E10 has no obvious effect, not
in my A224 which has been flying more than 5 years with nearly
exclusively E10. At my fifth annual inspection, per recommendations,
I replaced all of my fuel hose. There was no sign of interior
degradation, but I replaced the Gates R5 hose with R7.
If I had been particularly concerned I would have selected Aeroquip
666 teflon/carbon hose which has an infinite service life. It would
have required however replacing all the fuel fittings from barbs to
AN fittings from the tank to the engine.
If E10 is the only mogas you can obtain, it is still better for the
engine than leaded AVGas
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Ira N224XS
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