1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 162Get this manual
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CYLINDER HEAD
NOTE: Cylinder head gasket is not reusable
a-Bolts-Cylinder Head M8x78 (6) b-Bolts-Cylinder Head M6x25 (3) c-Cylinder Head Assembly d-Gasket-Cylinder Head (Discard) e-