I was using my Kioti a few days ago in 20 degree weather and the fuel light came on. it continued to run fine for 20 minutes and so i thought it must be some minor problem. but then it lost power and would only idle for about 5 minutes and shut off. the tank is full and there is no leaks. i tried turning and pumping the little manual primer and it started again and seemed to be fine for about 2 minutes and shut off again. can someone tell me what is wrong and how to fix it? thanks.