Hi guys,
First off, Jim, sorry about the "personal" post, I will keep that in mind for future postings.

TrooperFan, thanks so much for that information, it is really appreciated. I know about and have used SeaFoam in the past, so I will give that a try and see what happens. Previously I have just used it to de-carbon my outboard, but it sounds like its worth a try in the trooper as well. I too had heard some vague comments about "deposits" of some sort possibly causing the problem, but I wasn't sure what kind of deposits or where they were. Your post cleared that up.

I don't think this has anything to do with valve adjustment, as that has been done several times before with no affect on this idle problem, which has been around for at least 6 years during the warm weather. So, I'll try my luck with the SeaFoam, and if that doesn't work try some of the other options you mentioned. Thanks again-
Cory