I have just completed the 5 year rubber fuel line replacement on my Classic,
including
renewing the sight gauge clear tubing.
When I was replacing the sight tube I discovered the previous owner had at some
time installed a non-standard fuel gauge system (which never worked, but the
sight gauge did!) using an 'external' sender unit plumbed in from the sight
gauge
link from the LH tank. I am embarrassed to say I had never noticed this set
up as it was well hidden from view. I was not happy about this situation and
decided to remove unapproved kit and restore the connections per the build
manual.
The sight gauge on my aircraft runs from the LH tank, through the tunnel and is
securely fastened to the bulkhead on the left hand of the passenger seat. It
then routes through through the passenger headrest and follows the filler pipe
up to the vent on the fuselage. The system had worked well before and given a
reasonably accurate indication of the contents.
I thought I had done everything correctly and filling the tank the 'new' gauge
seemed to be giving what appeared to be logical indications. However when I flew
the aircraft for the first time the level in the tube went way past maximum
(I had a total of 55 litres on board), particularly in the climb. There was also
a smell of fuel which may have ben caused by the fuel venting.
My question is does anyone have an idea what could be causing this? There is a
restrictor in the tube similar to that found in the fuel return line. This was
in the previous set up so I re-installed it, but I can not find any reference
to this in the manuals. Could this be causing the problem?
Sorry for the lengthy post and any help would be greatly appreciated.
--------
Gordon Grant
G-BWFH
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