remember, you also said that you had the needle valves all over the place trying to get it to run on the bad fuel. make sure you have them adjusted back properly...I just had the same thing happen. I had some powermaster 30 percent that I usually run in my saito 56, but not in my 100. When I was running short on 15 percent at the field the other day, I decided to put the 30 percent into the 100 to run it one more time. I hadn't used the fuel in a few weeks. The engine would die as soon as I removed the plug. I thought maybe it was too rich (fuel cooling the plug between strokes). I leaned it up. Also, I was getting a lot of white smoke. I now believe that it was moisture in the fuel (from humidity) and that was the source of the white smoke (steam), and why the plug would cool off between strokes. I removed the fuel, and put the last of my 15 percent in, and it ran like a champ. I then put the other fuel in one of my two strokes and it ran like a champ too. Guess the plug staying hotter on the two stroke allowed it to burn the fuel just fine. I wouldn't make a habbit of it, and I used lots of after run oil after that, but it was a good way to get rid of the fuel without pouring it out. However, I wouldn't use yours, it may indeed be low in oil. If so, then the fuel complany may be liable for any damage to your engine....