Paul,
THe oil in the damper is purely to maintain contant depression (vacuum)
during acceleration and deceleration. It prevents the damper from moving
too quickly. I use ATF fluid. Any fluid of similar weight should do. You
might want to change the washer inside the needle seat assembly. Remove it
and take it to a hardware store. The washer doesn't come in any kits I've
seen for the ZS.
I would check the rubber diaphram thats under the hat of the carb for the
idle issue. A small rip in the diaphram might cause idle RPM issues. I
believe vacuum leaks could also be the culprit, as the leak can increase and
decrease depending on the expansion and contraction of the metals. Check
for a leak around the intake manifold, carb, and head. Use carb cleaner.
If the engine RPM's change when spraying the cleaner near the joints,
that's an indication of a leak. Just don't spray it near the venturi
opening, as that will defeat the purpose.
The list will be sure to correct me if I've misstated anything.
Michael
-----Original Message-----
From: paul.meyer@key3media.com [mailto:paul.meyer@key3media.com]
Sent: Wednesday, March 07, 2001 12:15 PM
To: spitfires@autox.team.net
Subject: LBC Carb question
I've been a lurker for some time, and thanks to all of you for your
insights, as
well as the terrific URL's.
I have a binder of info I've printed off the web as a result.
I can't imagine how much harder it must have been to be an LBC fan before
the
web.
My '77 Spit is not roadable, and will hopefully be so by spring.
I have some carburetor questions. The idle speeds up as the engine warms,
from
a feeble 650 or so at cold to about 2400 when hot.
I cleaned the single CD4 carb up with spray cleaner and that helped, but
it's
not cured.
I got the Haynes manual last week, and noticed they put 3-way oil in the
damper
- looks like the stuff from the hardware store. Is it? or is there some
special
type?
Could low oil in the damper (mine's bone dry) cause or contribute to this
problem? And what does the oil do?
I bought some 3-way oil, but I'm leery of touching the carb. Any advice is
appreciated.
Regards,
Paul Meyer
'77 Spitifire (Charity) she was free.
Gift horse comments not appreciated, but fully understood.
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