1998+ Mercury Mariner 25HP Bigfoot Service Manual, Page 108Get this manual

CHARGINGSTARTING SYSTEM
RegulatorRectifier (PN 854514-1) Diode Test
Analog Meter

BlkBlack GryGray RedRed YelYellow

GRY YEL YEL

DIODE TEST:

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives