1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 43Get this manual
INSP ADJ
PERIODIC SERVICE
D31800-9
FUEL ENRICHMENT VALVE ADJUSTMENT
1F ully close th ch oke alv e, djust th le gth of th ullin ire ok so th at th arks th plu er and fu el nrich nt alv are alig d2H ok th ullin ire ok to th ch oke le er pin 4, and old it ith th O-rin 5