1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 167Get this manual
1141 7 Clean and degrease the exhaust housing and adapter mating surfaces with OMC Cleaning SolventApply OMC Gel-Seal" to adapter flange of the outer exhaust housingPlace the adapter onto the outer exhaust housingHand tighten the five small retaining screws
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r:J7l 9Align the adapter with outer exhaust housing by placing
two or more ofthe long powerhead retaining screws through the adapter and outer exhaust housing10Apply OMC Nut Lock to threads of the front two upper thrust mount screwsPlace the ground lead CD under head of the starboard screw