2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 376Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 376

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CYLINDER BLOCKCRANKCASE
1 Measure piston ring end gap clearanceReplace piston rings as set if out of specification
NOTE: Ring should be level for measurementPush ring into bore with crown

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