The Stromberg carburator has a fuel shut off solenoid designed specifically to make run - on (dieseling) impossible. The solenoid is the large electric device coming off the bottom of the float bowl.
The valve is powered up for something like 5 seconds after shut-off. I would look for a disconnected wire (the solenoid is turned to adjust basic mixture - it is the base for the main jet). I would also check the fuses. I repeat that the valve is powered closed unlike many anti-diesel fuel shut offs that are powered while running and shut off with the key.
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
[This message has been edited by stevebfl (edited 04-28-2000).]