2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 111Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 111

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IGNITION
aDirect Voltage Adaptor (91-89045-1)DMT 2000 Multi-meter (91-854009A1)Ignition Coil Test Harness (91-881826)

NOTE: Use direct voltage adaptor, DMT 2000 digital multi-meter