1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 148Get this manual
Cleaning Before inspecting or assembling powerhead, all internal components must be perfectly clean and free of contaminants1Remove any carbon accumulation from exhaust port areas2Remove any carbon accumulation from cylinder head combustion chambers 3If cylinder walls are glazed from extended use, use medium
grit cylinder hone to resurface wallsUse slow RPM to achieve strong "crosshatch" pattern for best oil retention and ring sealingTo avoid piston or cylinder block damage, restore the chamfer to all port edges using ball hone or other suitable tool'" To avoid personal injury, wear eye protection and rubber
i gloves when using OMC Gel Seal and Gasket Remover
rv 4Use OMCadhesives,and Gasket Remover to from theall traces Gel Seal remove of gaskets, and OMC Gel Seal" cylinder