2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 112Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 112

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IGNITION

NOTE: Use direct voltage adaptor, DMT 2000 digital multi-meter and test harness 91-881825 while performing testMETER TEST LEADS RED RED BLKRED BRN BLACK BLU BLU BLU DC VOLTS METE