Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Remove the spark plug and with it grounded to the metal of the engine, see if it has spark when cranking. If it has spark, put a thimble of fuel into the cylinder, re-install the spark plug and see if it will start for a few seconds. If it does, there is no fuel getting through the carburetor.
This is two cycle engine, are you using premixed fuel?
I see question is still open , did you find the problem?