1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Manual, P/N 507263, Page 194Get 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 securely
2Clean 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 thread locking product, be sure to prime the threads with OMC Locquic Primer3Discard all oil seals, O-rings, and gaskets
4Examine 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 corrosion[]] 6Check the exhaust housing for distortionPlace the housing on surface plateUsing dial indicator, check flatness by measuring the run-out on the top edge of the housingThe maximum allowable run-out is 0.009 in(0,228 mm)If you do not have access to dial indicator and surface plate, seek the services of machine shopDO NOT attempt to straighten distorted housing; replace it On split gearcase modelsalso check parallelism of the upper gearcase housingSee Section 6INotel bent exhaust housing will cause upper driveshaft