cub cadet push mower

I have a cadet push mower not 2 years old wouldn't start cleaned out gas tank , blew out fuel line , replaced carb with brand new one won't stay running with out spraying carb cleaner into carb or it will die out ant ideas

You did this backwards and go crud back in a new carb. You should clean gas tank then replace fuels lines and filters then clean or replace the carb.