Tecumseh 20hp duel carb not starting

I have a 2000 murry riding mower and it has a TVT691-600401A 20hp v twin. I replaced the fuel pump, lines, and put on a bowl kit on both carbs. When I spray fuel in the carb it will fire up until that fuel is burnt. I took the carbs back off today. I removed the bowl full of gas and blew out the carb body with compressed air. put it all back together and nothing.