1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 112Get this manual
Installation
1Install the flywheel key: 9.9 thru 15: Install the key with its outer edge parallel to
taper of crankshaft 20 thru 30: Install the key with its outer edge parallel to centerline of crankshaft and single upset mark facing down2Clean the crankshaft and flywheel tapers with OMC Cleaning Solvent and let dryThese surfaces must be clean and dry to allow proper locking of the tapersf71 3Align the flywheel keyway and install flywheelCoat the threads of the flywheel nut with OMC Gasket Sealing CompoundInstall the nut and torque to the correct valueSee chart belowFlywheel Nut Torque Chart MODEL