Looks like this is a very old question - and that Europa supplied larger
restrictors. Very odd.
http://forums.matronics.com/viewtopic.php?p=403137
---------- Forwarded message ---------
From: Pete Zut <peterz@zutrasoft.com>
Date: Fri, Dec 4, 2020 at 7:39 AM
Subject: 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
the 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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