I like the Zenith and do think it is worth playing with. I have had a few Webers but really don't like them though I did manage 17MPG with one around the back roads of NY.
FWIW:The Infamous Zenith "Fix"
http://www.lrfaq.org/Series/FAQ.S.carb.zenith.fix.html
http://forum.landrovernet.com/showthread.php?t=56315
Another purported fix-don't do it
http://www.landrover.tmfweb.nl/
more discussion that also mentions the bulletin posted here!
http://forums.lr4x4.com/index.php?sh...1&#entry230601