1979 Evinrude Outboard 55 HP Service Repair Manual Item No. 5428, Page 79Get this manual
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SECTION LOWER UNIT TABLE5
Special Tools Required Part #324819 GaugeShift Rod GaugeShim Part #320739 Part #383175 Guide Pins Part #320675 HolderPinion Nut Part #316612 Holding SocketDrives