1984-1986 Mercury Force 9.9 and 15HP Outboards Service Manual, Page 30Get this manual
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FLYWHEEL
AWARNING
Cracked or chi pped fl ywheels must be replacedAt high engine RPMdamaged lIywheel may lIy apar1 throwing shrapnel over large areaInstallation Flywheel1 If lIywheel key ha