Dave Plowman (News) wrote:
Then presumably has an adjustment for the idle mixture?

Yes, but they're sealed. Federal law and so forth. I mean, no one would
ever know, but to get at the idle mixture adjustment screws, I'd have
to take the carburetor off and drill out the sealing plugs. There are
quite a few connections to the carburetor, so its removal is a major
undertaking.