CO testers are pretty cheap, Moss and J.C. Whitney sell the same one
(Moss wants $10 more):

http://jcwhitney.com/product.jhtml?CATID=35066&BQ=jcw2  $169.95

I'd really like to be able to test HC too, but multi gas analyzers are
out of reach for the amateur.

I'm tired of blindly fiddling with those SU jets on the MG's!

--
Stuart MacMillan
Seattle

'84 Vanagon Westfalia w/2.1
'65 MGB (Daily driver since 1969)
'74 MGB GT (Restoring sloooowly)

Personal mechanic for:
'70 MGB GT (Daughter's)

Assisting on Restoration (and spending OPM):
'72 MGB GT (Was daughter's, now son's)
'64 MGB (Son's)

Stripped and gone but their parts live on:
'68 MGB, '73 MGB, '67 MGB GT