1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 170Get this manual
STARTING SYSTEM
FUEL ENRICHMENT VALVE (25JEO, 25JETO, 30DE, 30DEO, 30DET, 30DETO)
1M asure: el nrich nt alv resista nce ut of sp ecificatio Re placeFuel enrichment valve resistance: BlackBlue 3.44.0 at 20C (68F)