Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 91Get this manual
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CHARGING" STARTING SYSTEM
==Tan =Tan WhtWhite Vel =Yellow
YEl_BlK===='.J YEl_BlK WHT_GRN _J GRN_WHT- '
a Voltage Regulator To Starter Motor Bolt Boss12V BatteryFuse-20A