1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 210Get this manual

1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 210

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CYLINDER BLOCKCRANKCASE
NOTE: Install used pistons into same cylinder from which they were removedNOTE: Install piston with "UP" mark on piston crown facing toward the flywheel side
PN FT2