Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 324Get this manual

POWER TRIM
Manifold Installation
1Install dowel pin and two (2) lubricated orings into trim cylinder

aO-Ring (2)Dowel Pin

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