Honda BF35A-BF45A Outboard Motors Shop Manual., Page 401Get this manual
10) Remove the three 20 mm screws, yoke and 0ringDiscard the O-ringReplace the O-ring with new one during reassembly SCREW (3)
BRACKET
1 Do not reuse1
11) Remove the armature and brush springsSee page 13-18 for brush inspection and brush replacement