Yamaha FT50C Service Manual page 256

TRBL
SHTG
Electrical systems
Symptom: Battery becomes weaker quickly.
• Check the charging system.
Measure the output peak voltage of the lighting coil.
Out of specifi-
cation?
No
Measure the Rectifier Regulator
output peak voltage.
Out of specifi-
cation?
No
Replace the battery, and then
check the whole voltage of all
electrical equipments on your
boat.
9-13
Troubleshooting
Yes
Replace the lighting coil.
Yes
Replace the Rectifier Regulator.
9
62Y5A11