Hi JB
When you blew air through the carb did you blow it through the fuel inlet (where the fuel pipe connects to the carb)? If so you have probably blown out the needle seat without noticing it as its very small and easily dislodged by air, this generally causes this type of flooding problem you will need to buy a new seat and fit it in the carb (the bit where the little needle sits in)
mowerguru, September 2009