1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 98Get this manual
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ASSEMBLY AND ADJUSTMENT
7 Place th driv e-sh aft in th ar case, and insert it into th pinio nTig hte th pinio ut to th sp ecifie torq eDrive shaft holder: YB-6079-A90890-06517 Pinion nut holder: