We may have found other answers which could help you.
Click here for Spark Plug Gaps 
                correct routing of cutter deck belt for mtd yardman riding mower?
 
                Lawn mowers?
 
                How can I replace the driveline belt on my Yardman MTD Briggs and Stratton ?
 
                will i kill my lawnmower if i add the wrong kind of oil?
 
                theres a fuel problem with my 10 yr old mtd yardman mower?
 
                I have been looking for service manual ?