1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 188Get this manual
Cleaning and Inspection Replace damaged componentsShift system failure will cause loss of control over direction of engine thrust&
1Discard all seals, O-rings, gaskets, and the clutch dog spring
Clean all gearcase components in solvent and dry with compressed airTo avoid personal injury, wear eye protection and regulate air pressure to not more than 25 PSI (172 kPa)After cleaning, coat all internal components with OMC Ultra-HPF gearcase lube to prevent rusting3Perform the following inspections:
Gearcase housingall gasket surfaces must be free of gasket materialAll threaded holes must be free of corrosion and sealerUpper driveshaft oil circulation hole must be clearHydrostatic seal ringsmust be in good condition to help prevent propeller ventilation
W Gearcase anodes -
if anodes have eroded to two-thirds their original size, they must be replacedRefer to Section for testing procedure14161