any ideas on why my lawnmower won't run?

[ebontrager93]

it's a small Briggs and Stratton engine on a Husquavarna mower. The engine starts and then it just quits right away. I've replaced the air filter and the spark plug. The oil is full. I disassembled and cleaned the carburetor. I've sharpened and balanced the blade. I've checked the flywheel key. Now I don't what to do next. Replace the ignition coil? Adjust the valve?

 

[bertsmobile1]

Any idea why you did not post the engine model number ?
love to help but have no idea which one of the 192,000 different small vertical Briggs engines you have there .