Fred,
The purolator filters do work and it is worth sticking with them.
I had exactly the problems recorded elsewhere on the list and having read
about the issue before first flight I ensured that I bought a stack of
refills before we got going. Yes the filters clogged in the test flying
despite all the preflight flushing I had done.
Over the first 25 hours the filters got cleaner and cleaner (or at least did
not clog as quickly). Now upto 50 hours and I have replaced the filters
again but only for sense rather than as they were blocked. I had used the
same filters for the last 15 hours without a problem.
My Test Pilot advised to keep the reserve filter unused (don't taxi with the
reserve line on, as per the manual) and then you know you have a clean
source of fuel if needed. I have only once had to change to the reserve and
that was in the first 10 hours when the debris was still being removed.
I hope this helps.
Regards
Steve Pitt
G-SMDH
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