Hi Darryl, welcome to Outdoorking.
The engine's cooling air cowl, which has the Model, Type and Code stamped on it, is missing in that picture. The Code tells us the date of manufacture of the engine.
Do not operate the engine without the cowl - it will overheat, and the air-vane governor will not work properly. There may be other essential items missing too - in particular, the plastic thrust bearing between the clutch arm and the clutch. The machine needs to be completed before it will be usable.
