Yamaha 115-225 HP Outboards Service Manual, Page 234Get this manual
IflEe 1.1
STARTER MOTOR
Brushes 1) Check the brushes for wearIf the size is less than the minimum specification, replace the brush-holder assemblies completeBrushes, size: Standard: 16.0 mm (0.630 in) Minimum: 12.0 mm (0.472 in) Brush-holder 1) Check for continuity between the brushholder and earthIf there is continuity, replace the brush-holder assembly