2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 270Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 270

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SERVICE PROCEDURES
aBottom water line (exit)bTop water line (entry)cWater cooled voltage regulatordFuel return hose from fuel pressure regulatoreFuel cooler retaining nutFuel return to VST