1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 187Get this manual
Cleaning Inspection and Repair All Models 1Inspect clamp screw assemblyReplace swivel plate and retainer if bent or looseTo install new swivel plate remove screw and old plateApply OMC Locquic Primer to the threads of the screw and allow it to dry four to five minutesThen apply OMC Ultra Lock to threadsInstall new swivel plate with screw and tighten securely2Clean 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 reassemblyWhen using an OMC thread locking product, be sure to prime the adhesion surfaces with OMC Locquic Primer3 Discard all oil seals, a-rings, and gaskets4 Examine the rubber motor mounts and replace if deteriorated or damaged5Inspect components for nicks on the machined surfacesRemove nicks and resurface faces on surface p1ateStart with No120 emery cloth and finish with No180 emery clothlength, on plate with surface gauge and scriberA drill press table will also serve, using the spindle as gaugeThe bottom surface of the exhaust housing should be parallel to the top surface within 0.001 in(0,025 mm) per 1.000 in(25,4 mm)The maximum allowed tolerance is 0.009 in(0,228 mm)DO NOT attempt to straightenIf bent, replace