[Al Skierkiewicz]

Sandrag,
Common Briggs problems start at the carb fuel interface. If yours is one of the carb on top of the fuel tank, check for leakage in the rubber gasket or a blocked relief valve in the fuel tank gasket. Most small engine places will sell you a carb kit for a few bucks that replaces all the usual suspects. A clean spark plug is essential and I wouldn't overlook the choke operation. If it starts fine after sitting but cuts out when warm, suspect the choke. If it runs high at idle suspect a really rich mixture caused by one of the leaks from worn parts mentioned above.