Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 252Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 252

CYLINDER BLOCKCRANKCASE
PISTON RING INSTALLATION
IMPORTANT: Use caution when installing piston ring to avoid scratching piston1Install the oil ring components as shownSpread rings just enough to slip over piston2Install the second and top compression rings (Uside up)Spread rings just enough to slip over piston3Offset the piston ring end gaps

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