Will crank but runs rought them cuts off

Sounds like water in the fuel, or old gas. Drain the tank into a suitable waste container. Drain the carburetor float bowl, and the fuel line. Reattach the fuel line, and clean the float bowl out. (BE careful of the float bowl gasket!)

Replace the float bowl, and add fresh gasoline. I would use at least 91 octane. (NO gasohol!)
You may have to run it for a while to straighten it out.
Also remove the spark plug, and see if deposits have built up on the center and side electrode.
Todays gasoline has all kinds of additives in it. Some are designed to keep deposits from building up so much. (In truth, all gasoline is the same)
These small engines, usually require changing the spark plug at regular intervals.