1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 48Get this manual
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2 Cle th sp ark plu ith sp ark-plu cle er or ire brushU se ire to djust th plu to sp ecificatio nSpark plug gap: 0.91.0 mm (0.0350.039 in)
3 If th electro eco es to