I have a craftsman riding mower and it dies after running afew minutes. If you let it sit for a few minutes it will fire back up and run for a few more minutes and dies again. Ive rebuilt the carb with new gaskets(seals), put a new fuel line and filter, and a new air filter. Still it will run for a minute and dies
A common problem with that unit is venting. Next time it quits pull the fuel line at the filter, then if no fuel or very little fuel is flowing, loosen the fuel cap and see if that solves your problem.