Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 55Get this manual

IGNITION SYSTEM
3Use puller (a) to pull flywheel4Remove puller, flywheel nut, washer, flywheel and key
91-83164M

INSTALLATION 1Install flywheel key (a)2Install flywheel (b)washer (c) and nut (d) onto end of crankshaft

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