Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 201Get this manual

CYLINDER HEAD
4Remove cylinder head screws
aScrews (B)-M9x95

5Separate cylinder head from cylinder blockNOTE: Cylinder head gasket is not reusable

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives