2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 248Get this manual
Starter motor (electric starter model) 3Measure the commutator undercut aReplace the armature if below specification 2 1
S6AG8470
Commutator standard undercut a: 0.8 mm (0.03 in) Wear limit: 0.2 mm (0.01 in) 4Check the armature for continuityReplace the armature if out of specification
Brush holder assembly continuity Checking points Brush Terminal Brush Brush Brush Terminal Continuity Yes No
2Measure the length of each brushReplace if below specification