I have had my TBC 2510 trimmer for about four years now and it has worked great up until last week. I only mow a few lawns so it doesn't have a lot of hours on it. While I was using it the other day, it just quit running and now it won't crack. I have pulled the plug and it is firing, so I'm guessing it must be a fuel problem. Does anyone know what might be wrong? Any advice is appreciated. Also, the string spool in the head has one of the "hooks" broken on it. Does anyone know of a competitively priced online source for Tanaka parts?