Mike L.
Are you 100% sure you have fuel at the carb???? A good steady flow out of the tank and a full float bowl?????? Clean orifices in the carb????
Pull the air cleaner cover off, take off the air cleaner, and dump a teaspoon full of gas right down the carb bore....THEN crank it over a see if it runs.
(BE CAREFULL doing this!!!!, and if it backfires keep cranking and suck the flames back into the engine)
If it runs when "spoon fed" you need to rebuild the carb.