Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 141Get this manual

CYLINDER BLOCK AND CRANKCASE
12Remove piston assembly from the crankshaft

aConnecting Rod
b -CapBolt (2)Piston PinClip (2)Piston

13Press the crankshaft out of the cylinder block

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