Unfortunatly it has a carborator on it and most of the ppl on this forum are younger than that...
Not to mention we think in terms of gallons and miles...
I know on import carburators the floats are pretty much the only thing that go bad, they'll become saturated with gas and flood the motor.
So since I can't diagnose it, lets shotgun some parts. Replace the float, it's cheap. Then put new plugs in it since yours are fouled out.
Good luck.