of plugs and a test flight before your trip to see if
you get the same symptoms when leaning.
I’m using NGK B9EGV. It’s
easy enough to put in a new set, although I normally order them on-line since
they are pretty spendy at the local store – if they have them. I
don’t think the plugs are the issue; I think Dave’s point about
some unevenness in the mixture between rotors is the likely culprit. It
will be easy to see when I get flying – which may not be until I leave on
the trip. I’m not too concerned since I can get over 20 mpg at 200
mph with EGTs below 1700F.
Al