What year was model 917292301 craftsman tiller made?

Not to say that this is the final say, but the manual has a 1998 print date. The engine is a Briggs and the Code on the blower housing will tell you when engine was built in the form of YYMMDDSS where YY is the last two digits of the year, MM the month, DD the day of the month and SS is the shift and factory.