1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 173Get this manual
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STARTER MOTOR
Armature inspection 1M asure: utator dia eter ut of sp ecificatio Re placeCommutator diameter: Limit: 29 mm (1.14 in)
2M asure: utator ercut ut of sp ecificatio Re pla