Honda BF35A-BF45A Outboard Motors Shop Manual., Page 424Get this manual
1) Apply grease to the oil seal lip Check the oil seal lip.If the oil seal lip is damaged, replace the front bracket as assembly2) Expand the brushes and install the armature taking
care not to damage the oil sealRemove the burrs at the armature shaft with fine emery paper before assemblyMake sure that the brush springs are in place
FRONT BRACKET
BRUSH SPRING
[4] OIL SEAL LIP
3) Apply grease to new motor O-ring and install it on the front bracket
[I] 20 mm SCREW (3)