Small Engines (Lawn Mowers, etc.): yardman 6 hp wont start, carborator, torch tip

Question
i have a push mower briggs and stranton
i have cleaned the carb. change the air filter and spark plug. i even clean the screen on the carborator. it trys to start and then dies quickly. any suggestions.

thks
tom

Answer
does this engine have a primer? and did you clean the main jet? the main jet is also the bolt that holds the carb bowl on
they are very sensitive to dirt i use a torch tip cleaner when i do it because they are sized just as jets are you can use the proper size for the jet and not oversize it.