Pete - yes, apparently the restrictor with the larger orifice supplied by the
Europa
factory was intended to reduce vapour lock issues. See my journal for 20th
& 21st June 2013:
http://www.rowlandcarson.org.uk/aviation/europa_435/201306.php
in friendship
Rowland
> On 2020-12-04, at 12:42, Pete Zut <peterz@zutrasoft.com> wrote:
>
> 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
> To: europa-list <europa-list@matronics.com>
>
>
> 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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