1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 164Get 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 threads with OMC Locquic Primer2Discard all seals, a-rings, and gaskets3Examine the upper and lower thrust mounts, and replace if deteriorated or damaged4Before checking the exhaust housing for distortion, thoroughly clean the top and bottom mating surfaces and remove all sealer and corrosion [ITjj]
rv onCheck the exhaustUsing dial distortioncheck the housing 5housing for Place surface plateindicator, flatness by