parts for engine?

i own a mastport rototila powered by a briggs and stratton ,,, only numbers on it are 80212 0573 - 01 7411080 ,, i cant find the year or date of manufacture or the bhp from these numbers for some reason ,,, I need for parts ,,can you shed some light on what the engine is ?????. the engine reguires valve guides rings etc and my local supplier doesn't have a clue which model it is ,,other than he thinks it was made in the 1970's