Run problem on old Briggs and Stratton Troy Bilt tiller engine.
Engine will start if choke is closed, but dies when choke is opened. It will continue to run with choke almost closed for a short time, then it dies. I've verified that there is not a problem with the fuel line or filter. When the line is disconnected from the carburetor, fuel flows freely. This tiller is an early version build date in the early to mid seventies.