I was using my saw today. Cutting wood up through the wood instead of down cause of the wood pinching. After that I ran it for a little bit more cutting in the regular way. I set it down and it sputtered a little. So I went back to cutting and everything was fine. Then I set it down again and it just died. I can pull the string out maybe 6 inches. Thats it. I think the piston is seized up. But I dont know how cause my mixture of oil to gas is right and I had plenty of bar oil. Any idea what could be wrong? Thanks for the advice!