Mercury Force 9.9, 15HP Outboards Service Manual, Page 64Get this manual
c REMOVING FLYWHEEL
1Remove engine cover
AWARNING
Always remove spark plug leads from spark plugs before worki ng on engine2Remove starterSECTION FOR MORE SEE STARTER INFORMATIONRemove fl ywheel Remove flywheel nut (A) securing flywheel to crankshaft
Thread knock-off nut (Special Tool NoFT-2909) into crankshaft until it bottomsBack out two full turnsInsert flywheel removal tool between flywheel and top of power head