I did a turkey last weekend and at highest setting I was getting just under 300, maybe 295. I have had it up to 350-375 before but for some reason it would not go over 300. I thought maybe my tank was low on fuel and maybe not enough pressure, so I put on my new full tank and it was the same. I've seen where lots of people have problems getting low temps with their GOSM but I've never had a problme with that, I've been able to get from 175 or lower during the winter all the way up to 350 plus. I could hear the flame, it didnt even sound like it was on full blast. Maybe I need to clean the burner?