mal is correct,you cannot tell what mower from the part number.In regards to the two
crankcases it may be possible to tell what model from any part numbers you can find on the crankcases or even the conrods. there could be a number inside the recessed section where the cylinder bolts.Mal, engine 266x was supplied to "condeco",a company I
don't know about but maybe they built austral mowers.engine 194x is supposed to be a mk2 midget and supplied to champion.champion did sell rebadged stationary engines.on another note,the easiest way to tell the difference between the midget and the G series
engine is by the direction of the fins on the top of the engine. regards,john