Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 71Get this manual
CAUTION Use care not to scratch the brushes when installing the armature on the rear cover
IMPORTANT: Install new circlip when installing pinion onto shaft
NOTE: Make sure the circlip fits tightly into pinion stopper3Install the pinion assembly onto starter shaft
NOTE: Align the cut in the cover with the projection on the stator2Assembly starter motor assembly aligning the housing marks as shown