Whoa, if the plug is wet and the spark is good, it is way too rich - don't prime it, either with the priming bulb or by putting fuel into the cylinder.
I think you will need to spin it over for a while with the spark plug removed, to evaporate the excess fuel currently in the cylinder. Then try following a normal cold start procedure: say three primes, controls in starting position, and give it a try. If the plug gets wet again, it will sound as if either the air cleaner is blocked, or the carburetor is flooding.
