Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 101Get this manual
-PENCIL LINES 120 APART #'
TOP END (TOP VIEW)
DIf 80 or more of lines are gone and no rocking is notedclean tapers and re-install flywheelbut if less than 80 of lines are taken off, repeat above steps to recheck wearEIf three (3) lappings can not correct taper, replace
flywheeland if new flywheel does not lap inreplace crankshaft5Clean all compound from flywheelcrankshaft and key waysInstallation Check crankshaft and flywheel tapers for traces of oilThey must be perfectly drySwab tapered surfaces with solvent and blow dry with compressed air
Figure 8Marking Crankshaft
WARNING
Wear safety glasses when compressed airBMount flywheel on crankshaft and turn flywheel one full turn while pushing down lightlyCRemove flywheel and check percentage of lines rubbed offFigure 9working with