Small Engines (Lawn Mowers, etc.): 21.5 BRIGGS, manifold gaskets, piston rings

Question
HELLO, i HAVE A 21.5 BRIGGS TURBO THAT IS ON A CRAFTSMAN MOWER THE PROBLEM I AM HAVING IS THAT IT WILL ONLY RUN WHEN THE CHOKE IS PULLED ALL THE WAY OUT , i HAVE REMOVED AND THE CARB AND RODED EVERY HOLE I COLD FINE AND BLEW IT OUT WITH COMPRESSED AIR, THE PUMP IS PUMPING FUEL TO THE CARB STRONG AND i SEE NO OTHER FUEL ADJUSTMENTS EXCEPT A IDLE SCREW WHAT DOESNT SOLVE THE PROBLEM IM HAVING, THIS MOTOR IS CLEAN LIKE NEW LOOK, I ALSO CHECK THE ELECTIRC VALE ON THE CARB TO SEE IF WAS OPENING AND CLOSING WHEN KEY WAS TURN ON AND FUEL IS FLOWING THREW THE VALVE ALSO REPLACED O RING WHEN BWL IS PLACED BACK ON CARB. THIS CHALGEN DROVE ME NUTS, SHOULD i REPEAT ALL MY STEPS AGAIN , WOULD A GROUND WIRE CAUSE THIS PROBLEM? tHANKS IF YOU CAN hELP

Answer
Most likely you have an air leak or engine vaccum problem.

Did you replace the intake manifold gaskets?  Did you perform a leakdown test on the cylinder to check the head gasket, piston/rings and valves?

Is the valve breather sticking?

Let me know.
Eric