to unflood you take out the plug and crank the engine over. but make sure before you change the plug maibe its not flooded, if its new the compression is tight and it feels like its flooded but its not , so make sure your getting fuel in the engine in the first place i like to give a couple off drops of fuel in the carb when i start a new engine that usaly gets it going but before i doo that i unplug the fuel line from the engine so it will not endeed flood. good luck m8 and let us know what happens