Im having trouble with my jd mower- when i shut it off, it will not restart----pulled air filter and found about 1/4 inch of fuel laying underneath it- soaked it up with a paper towel, left it set about 20 min and it started right up-----has new sparkplugs, air filter, fuel filter------did this a couple times last summer also-20 hp twin cyl Kawasaki, has 600 hrs on it, bought in 2002 i think. Carb is preset a factory and book says no adj there-------any ideas on where i need to be looking would be appreciated. Afraid the whole thing will catch fire----------------------Jimbo