1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 188Get this manual
Cleaning and Inspection 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 Primer3Discard all oil seals, a-rings, and gaskets4 Examine the rubber motor mounts and replace if deteriorated or damaged5Before checking the exhaust housing for distortion, thoroughly clean the top and bottom mating surfaces and remove all sealer and corrosion1.jl Check parallelism of the exhaust housingPlace the housingL!J on surface plateUsing dial indicator check flatness by measuring the run-out on the top edge of the housingThe maximum allowable run-out is :008 (0,20 mm)DO NOT attempt straightenIf the housing is distorted, raplace itIf the required equipment is not available, consult local machine shop