Yamaha F100B F100C Outboards Factory Service Manual, Page 336Get this manual

Yamaha F100B F100C Outboards Factory Service Manual, Page 336

Quality of the image is intentionally reduced!

TRBL SHTG
Replace the lighting coil
Measure the Rectifier Regulator output peak voltage
Out of specification? No

Replace the Rectifier Regulator
Replace the batter