Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 202Get this manual

CYLINDER HEAD
Cylinder Head Disassembly
NOTE: Refer to section 4C Lubrication for oil pump removal1Hold driven gear using tool and loosen screwRemove screw, washer, driven gear and dowel pin

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