2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 249Get this manual
Electrical system
Assembling the starter motor
CAUTION:
Do not allow grease or oil to contact the commutator of the armature1Install the brush holder assembly into the bracket 2, and then tighten the screws 32Install the O-ring 4, spacer 5, washer 6, and spring washer 7, and then tighten the nut to the specified torque
S6AG8490