1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 112Get this manual
Installation
r;;l 1Install the flywheel key with 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 tapersf6l 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 FTLBS