The problem is identifying these engines.
Based on the following from a Briggs user manual I think I have ID'ed the engine.
The following show the fuel pump on the carb and the text does not say anything about the tank half full so this carb is a pulsa-jet.
Found a video of a similar engine. The label looks a bit more modern then what is on the one shroud I have. All I can find of it now is this still.