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I have a Snapper and Troy-Bilt lawn mowers, both have the same Briggs engine 550EX 140 cc. I have cleaned the carbs on both of them after bad gas sat over the winter. Neither on will start. If I give it a shot of starting fluid it runs for a second, never gets gas form the carb it seems. Any ideas?

Do you have your engine model?
If i remember right they have the plastic carbs??

Yes, the carb is completely plastic. I got some numbers off the block not sure if its the engine model or not.
I pulled the carb agian just to make sure the bowl was full of fuel and it was. This really has me stumped.

9P702 0144 F1
DOM 08 19 13

So this has even got stranger. I let the mowers sit a few days cuz I was at a loss. I gave it one a last chance pulled it once and it started and runs fine. The other one still will only run for a second on starting fluid, what the heck?

All i can suggest is what i did with one carb similar to yours, take it off, take it apart, spray out every little hole,passage way and jet.
here are some diagrams that might help you https://www.jackssmallengines.com/j...es/09p700-to-09p799/09p702-0144-f1/carburetor