1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 47Get this manual
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INSP ADJ
25JEO, 25JETO, 30DEO, 30DETO
Reed switch ON Oil level more than 200 cm3 (0.21 US qt) 200 cm3 or less (0.21 US qt) Speed Oil level Warning drop warning buzzer function lamp