1998 Yamaha 25J, 30D, 25X, 30X outboards Factory Service Manual, Page 176Get this manual
CHARGING SYSTEM
CHARGING SYSTEM PEAK VOLTAGE
1M asure: Rectifier utp ut ak olta xcessiv ely elo sp ecificatio eck th lig htin coil utp ut ak olta eLead color: RB rmin Cranking 3.5 Circuit 1500 12.0 3500 20
2M asure: Lig htin coil utp ut ak olta sp ecificatio Re place th rectifierB elo sp ecificatio Re place th lig htin coilLead color: GG rmin V