2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 263Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 263

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SERVICE PROCEDURES
4 Stroke Outboard Oil

aFuel pressure regulator screw (2) M6 12 Fuel pressure regulatorFuel pressure regulator O-ringPort fuel railCollarFuel rail location tabsFue