This past week I picked up an echo 230 on ebay. Item was listed for parts/possible rebuild. The end price was 56.00 Well, brought it home and it took all of 20 seconds to get it running (pulled off an air filter that probably hadnt been changed its whole life) Next-I pulled off the entire muffler last night and was scraping the carbon with a slim pick. My question is-can you burn out the carbon with a propane torch? I think somone mentioned this once. I mean, scraping dosent seem to do the whole trick... THANKS!