I think my point is a lot of people don't realize that the M and SM carbs are different, that includes the CaseIH dealer. So I suspect that the parts used in yours were for an M. Not knowing the difference, I cleaned and put the correct kit in my SH, but I did not touch the main jet needle and jet. I adjusted it the way I always adjusted an H. Worked fine until I started up a slight incline with no load -- it wasn't getting enough fuel -- that is when I read the operators manual and found the 5 turns out thing. The SM and SH carbs are also different, but I don't think a correct SM carb will pull anything with the needle 2.5 turns out. The SM I have is undergoing restoration. It came with an M carb. I have a used SM carb for it that has been cleaned and rebuilt, I don't know what the main jet is. If I ever finish the thing I will do some experimenting and adjust it as is correct for an H and M. If it is ok, I will try to find a jet and screw for a SM. As you say 5 turns out with a M main jet is way too rich.
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Today's Featured Article - Picking Corn - by Rick Nikolich. It was the day before Christmas shutdown at work and I asked our lead engineering expert Scott Andrzejewski what he was going to do over the holidays. He said that he had some corn that he still needed to pick with an antique one-row New Idea corn picker. Scott has a nice farm about an hour north of Lansing in St. Johns, MI. He wanted to get the rest of his corn in by the next day (Christmas Eve). We had about an inch of new snow on the ground and single digit temperatures. So in the bac
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