While you wait for answers, we may have found some information which could help you.
Click here for Head Gasket Bolts
                Lawn mowers?
                my mtd lawnflite 547 wont start (12 hp briggs & stratton )?
                will i kill my lawnmower if i add the wrong kind of oil?
                starting a lawn mower?
                How can I replace the driveline belt on my Yardman MTD Briggs and Stratton ?
                No forward or reverse on 1997 MTD after changing the front drive belt?