In reply to a message from Eric318 sent Sat 7 Jul 2007:
Hello all,
I am glad to report success with HIF7 carbs and AED. A
complete strip down, clean up, adjustment on the dinning
room table and refit by the book brought success!!
I confess I had cold sweats with the inner workings AED and
eventually left all the settings untouched after cleaning it
all thoroughly. I only replaced the gaskets. Incidentally re
gaskets, I ordered a �12 service kit that was of no use,
being only for the float chamber. I ended up with a �0.30
piece of gasket paper and 2 hours with a paper cutter that
yielded a very satisfactory job. I had to sand down the
float chamber lid on an emery cloth and a flat surface as it
was slightly out of true and therefore not fuel-tight: I
believe this may have solved solved part of my
out-of-the-ordinary fuel consumption…
The carbs were a real pleasure to work on and are now set
properly with the jet 3mm under the bridge, all clean inside
out. I rectified one of the pots that was slightly sticky
with the magic emery cloth and more importantly I reset the
height of the floats: these were worryingly out of wack.
Also, I found out that during the previous service, done at
good expense by a ‘‘specialist’’, one of the
air-filter-box-to-carb-spacer gaskets had been placed upside
down therefore blocking two air holes into the carb. I am
not too sure what these actually do, but if somebody
bothered building the system that way there must be a reason.
I got up at 4.30am last week end to refit all that in the
quiet peace of the bright Irish morning. All was going well
with the static work and the final drop of the right SU oil
went cleanly into its permanent spot. I turn the ignition on
and events took a different turn. I got through the
inevitable overflowing AED, and fuel spills from
misconnected pipes and other beginners mistakes (hey it was
very early…) and by 6am, having taken the whole set up off
and refitted twice I was near nervous breakdown: it just
would not start and I was running out of juice in the battery.
Then the SU gods must have had pity and the miracle
happened… It burped into life. Pheew…
I have not driven it much since, but already it does not run
as rich as before and the engine is substantially smoother
(I also discovered that the spark plug lead no2 was almost
burnt off at one end and replaced it: that got rid of the
hesitation and annoying misfire I noticed at full throttle).
I still starts like a dream, cold and hot.
Issues left (well, that I can tell for now) are: the float
chamber of the front carb is letting tiny amounts of fuel
sip out: the ring gasket must be cooked so I ordered a pair
(�6 from Southern Carbs!!) and the
air-filter-box-to-carb-spacer gaskets are ordered from David
manners were the wrong ones, so I have asked for
replacements and I currently use home made cut-outs.
Thanks again to those who encouraged me to not abandon the
AED and who sent scans of clockwork adjustments inside. The
machine is working as intended and this is a great pleasure.–
1975 XJ6C - LHD
Malahide, Ireland
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