1) Your tank almost certainly has a fuel filter. Pop the tank off and see. Replace it. 2) Go to O Reilly's and get the correct length of fuel line of the proper inside diameter. Make sure it is actual fuel line, and not something else. Replace the fuel line. 3) Replace your air filter. Do this annually on all your small engines. Clean your air filter regularly. Clean it more often if you have dusty and dirty conditions. DO NOT WASH IT. Just shake it out as best you can. If you absolutely MUST wash it, do so, then smack your forehead with a claw hammer. Seriously, DON'T wash it. The water present in the filter when you reinstall it WILL harm the engine. You could by two, install the brand new one. Wash the old one. Let it dry for a week until you need to mow again. Then swap them, repeat. 4) DON'T CLEAN YOUR PLUGS. Replace them. They are a couple bucks. Replace annually. 5) Use Stabil or other gas preservative all the time. Use the highest octane gas you can get. Not for the octane, but because it usually comes from better storage tanks at the fuel depot before it even gets to the station. Buy gas from the most reputable station you can, Phillips, Sunoco, Shell, Union, Etc. All of these folks sell gas to other gas station brands. However, they only sell the BEST gas to their own brand. Joe's Cigarette's and Gas will only be able to get the crappy grade, stored in the worst tanks, and Joe's tanks are likely crappy, too. 6) After all that replace the carb, or just rebuild it. Clean it with compressed air and carb cleaner. If you don't have a compressor, just buy cans of compressed air for computer cleaning. 7) if after all that it still doesn't work, throw it out and buy a Stihl. Buy your small engines from a small dealer. Avoid any brand that is sold at box stores (which now includes Honda and JD). If you buy from Walmart, I am sorry, but you deserve what you get. Ariens, Gravely, Grasshoper, Stihl, those are good brands. Expensive in the short, cheaper in the long. Troybilt is MTD. They are a shadow of what they once were. As always. Wear eye protection. Be safe. Also, place a call to MTD/Troybilt. Complain. Say that you love the brand. Give them a tear jerker of a story, who knows, maybe they'll throw you a bone. It has worked for me in the past.