1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 196Get this manual
Cleaning and Inspection 1Clean all parts with parts cleaning solvent and dry with compressed airAll nut and screw threads coated with OMC Screw Lock or OMC Nut Lock must be thoroughly cleaned before assemblyWhen using thread locking product, be sure to prime the adhesion surfaces with OMC Locquic Primer
2Discard all seals, O-rings, and gaskets
3 Examine the rubber motor mounts and replace if deteriorated or
damaged
4Before checking the exhaust housing for distortion, thoroughly
clean the top and bottom mating surfaces and remove all sealer and corrosion