Simply plugging the part number 08p502-0063-F1 into Google comes up with multiple locations that have parts diagrams, I didn't find any service manual info with torque specs or bearing clearances, but I only looked for a minute. If you google the number and dig deeper you may find something. Alternately, if there are any small engine repair shops in your area, you could visit them - if you ask nicely they may let you look at their manuals.