2002+ Mercury Mariner 150/175/200 EFI 2-stroke Factory Service Manual, Page 107Get this manual

2002+ Mercury Mariner 150/175/200 EFI 2-stroke Factory Service Manual, Page 107

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CHARGINGSTARTING SYSTEM
Diagnosis of Alternator System on Engine

IMPORTANT: RED output lead from alternator must be tightA darkened RED sleeve indicates lead was loose and becoming