zenith carb settings

[naldous@ccgmail.com]

My 70 gt6+ is having a hard time starting and I think it is because of my
screw settings.  Could anybody tell what they have theirs set at to give me
a hand setting my zeniths?  Currently, my brass screws are all the way
clockwise and then backed off 21/2 turns and the air bypass screw is all
the way counterclockwise.  I smell gas sometimes too.  Once started and
warmed up, it seems to run great with no hesitation.  Any help will be
greatly appreciated!
Nathan