Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 199Get this manual

CYLINDER HEAD
2Inlet and outlet fuel pump hoses3Breather hose
aInlet HoseOuttet HoseBreather Hose

Cylinder Head Removal

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