Hi Pete
If you are running the latest mechanical fuel pump I think you will find th
at Rotax have published information that states a brief drop in fuel pressu
re is =9Cnormal=9D. I have never understood why this should be
=9Cnormal=9D but
I don=99t think it is linked to the size of the return line orifice.
Regards
Brian
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> On Behalf Of Pete Zut
Sent: 04 December 2020 12:40
Subject: Europa-List: 912ULS fuel return line orifice size
Hi Folks,
I'm currently re-doing my fuel lines and configuration and have discovered
my return orifice was made at 1/32" or 0.68mm which is twice the size of th
e spec'd rotax 0.33 mm or 1/64". It may explain why whenever I turned the
electric pump off the pressure would drop to near zero for a couple seconds
before recovering to the expected 4-5psi.
Curious what size other folks are running? 0.33mm?
Cheers and thanks,
Pete Z.
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