Mercury Force 9.9, 15HP Outboards Service Manual, Page 78Get this manual

8 Remove flywheel nut (A)Check breaker point tension
OBSERVE
Tension between 16 and 32 ozTension not between 16 and 32 oz10Install flywheel
WHAT TO DO
Go to next stepReplace points

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