1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 37Get this manual
INSP ADJ
PREDELIVERY SERVICE
D23000-0
GEAR OIL LEVEL
Re th oil-drain plu and oil-le el plu and th sp ecifie ar oil thro th oil-drain ole ntil it erflo fro th oil-le el oleRe-fit th plu gs(T oil le el plu first)NOTE: sure th otor is ositio straig ht ch eckin th oil le elD23502-1