I'm befuddled: Craftsman, model 917.273758, cranks up easily, and runs fine for about 5 minutes and then abruptly stops and dies. If I let it sit and cool off for about 5 minutes I can get it going for another two or three minutes, but then it will shut down again and needs another cooling off period. I've recently changed the spark plug, oil, oil and fuel filter, and have been adding fuel stabilizer to the gas. It feels like at some point it ceases to get adequate fuel, but i can't imagine why that would be. Thoughts?