2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 195Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 195

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THEORY OF OPERATION
Electronic Control System EFI System Ignition System Sensors Intake Air Temperature Sensor Crank Position Sensors Oil Pressure Switch Manifold Absolute Pressure (MAP) Sensor