I have a Craftsman 190cc Briggs & Stratton 22" front drive self-propelled mower. When I start the mower it runs for about 1-2 minutes and then dies as I'm mowing the grass. My grass isn't very long or wet so I don't think it's grass getting caught inside of it. I changed the spark plug and air filter today and put new oil in it. The gas was put in about a week ago. I cleaned the carburetor and the bowl about 3 or 4 weeks ago. I can't really remember. Does anyone have an idea to what could be causing this problem?