Small Engine Troubleshooting Problems? Ask a Mechanic Now.
When did you last use it? I worked ok, with the new carburetor? If you remove the spark plug, and ground it to the engine metal, do you have good spark? Is the plug wet? If you have spark, and plug is dry, put a few drops of fuel direct into the spark plug hole, re-install the spark plug and see if it will fire for a few seconds. If it does, but will not continue to run, it is not getting fuel to cylinder. Is carburetor mounting gasket good and are the screws tight? Did you replace the fuel lines when you cleaned the tank?
Sorry I have been out of town on unexpected probelm. Did you get it running?