I have had two problems with my T-231 in the past two weeks. First I had troulble starting the trimmer when hot. I replaced the plug and the seemed to help although I dont know if that was the original problem. Now the trimmer head continues to spin when my fingers are off the trottle. Carb problems? Any other ideas? If it is the carb what can I do to fix it. I rather work on it myself instead of paying somebody. I should also mention the trimmer is only a year old.