Starts but won't stay running

I was given the mower, it's been sitting s while. So I've replaced battery, selenoid, cleaned air filter, new gas(was empty). If I spray started fluid in under the air filter it will start but won't run. I also put carburetor cleaner in the gas tank but a half dozen cranks later over the next 30 minutes it still won't start. Not sure how to get to the carburetor and how to clean it if I do. Looked through many diagrams here with no luck. Help!