6hp Briggs & Stratton craftsman won't start

I have a 6hp B&S Craftsman mower that when I try to start it, it won't start. I went ahead & cleaned the carb, as well as replaced the gaskets & the primer bulb. Before I did this the mower would start but only if you spray starter fluid in the intake. It will still start with the starter fluid but no go when trying to use the primer. I have another mower with the same style primer & it fires right up after pumping the primer 3 times.

It's the 6hp engine with the primer button on the front of the mower. I'm trying to get this mower fixed for a buddy of mine so any help is appreciated.

Thanks!