1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 61Get this manual
CARBURETOR
E 7Install th pilot-scre ith its sprin g, scre it in tig ht and th scre it ack th sp ecifie er of turns ut
CAUTION:
Do not cause damage to the tip of the pilot screw by over-tightening it