Howdy,

I would say the first order of business is take care of the flooding carburetor. If you already know all this, just ignore it.

Remove the fuel supply hose. Take the top off the float bowl (three screws) taking care not to tear the paper gasket. The float and needle assembly will come out with the top of the bowl. You will probably find some tiny trash in the bowl. If so, the most likely problem is trash trapped between the needle and seat. Hold the float assembly gently, shake it a bit while listening for fuel sloshing inside. If you don't hear any, good. If you hear liquid, the float is leaking and will need to be replaced. Check the end of the needle for deformation. It should be a cone with no indents. With the needle out, blow through the fuel inlet to clear any trash or debris. Reassemble.

Now you can address spark, air, and fuel issues. ;-)

--sd