Snapper Walk Behind Mower

Hi:

I am reparing an older Snapper walk-behind lawn mower with a Brigs engine. I Just cleaned the carb and it runs fine for about two minuts then it dies. After it sits for a few seconds it starts up for another two minuts. I can stop it frome dieing by choking it but when I turn the choke off it dies instantly. The mower ran fine just a fiew days before and I need to get it back to the customer.

Any help would be appreciated.

Thanks,

Nate