On a post note after sleeping on this problem, the sediment bowl had crud in it. The combine ran fine until I moved it. That is when the problems began. From the YT board comments, I think the next step is to drain the gas tank, remove it and have it boiled. I am guessing the fresh gas is slowly stirring up what is left of the old varnished stuff since the fuel strainer was packed with "playdo" and a lot of green stuff washed out in the first 10 gallons of gas when I flushed the tank in late November.