1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Manual, P/N 507263, Page 258Get this manual
Cleaning and Inspection &
Replace damaged componentsShift system failure could cause loss of control over direction of engine thrust
1Discard all seals, O-rings, gaskets, and 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 OM: 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 sealer Gearcase anodeif anode has been reduced to twothirds of its original size, it must be replacedRefer to Section for testing procedure Driveshaftcheck splines for chips, wear, and cracksBearing and gear surfaces must not show signs of metal transfer, corrosion, or discolorationSevere spline wear might indicate an exhaust housing or gearcase has been distorted by impact damage Water intake screenmust be clearIf screen can't be cleaned, it must be replaced All internal componentsmust be visually inspected for signs of wear, distortion, chipping, metal transfer, pitting, galling, and discoloration due to improper lubrication Water pumpcheck impeller for wear, crumbling, and hub bondingCheck liner and wear plate for scoring and distortion