There's a weep hole on each pipe that you can see first thing in the morning
when you crank it up, before it stops smoking. Crank it up with the choke on,
and stand back and look, you should be able to see it right away... They point straight down,
and are right under you... might be coming from there...
I thought I had a picture, but my file called "choke" turns out to be this


-Mike