2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 325Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 325

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CYLINDER HEAD
a -Valve cotter -Spring retainer -Valve spring -Spring seal -Valve NOTE: Do NOT remove valve guide unless it is out of specificationSee "Specifications" at beginning of this sectio