Hi Joe, just noticed that this engine was manufactured on the 12th August 1988.

With thanks to grumpy, here's some more info:
Here is the illustrated parts list:
http://bsintek.basco.com/BriggsDocumentDisplay/Z6ntACVJ1DajI.pdfHere is the operator's manual:
http://bsintek.basco.com/BriggsDocumentDisplay/flivAJX-nfBhU7y.pdf