1988 Johnson Evinrude CC 60 thru 75 outboards Service Manual, Page 167Get this manual
Cleaning INotel 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 chambers3If 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 sealingINotel To avoid piston or cylinder block damage, restore the chamfer to all port edges using ball hone or other suitable tool ill gloves when using OMC Gel Seal and Gasket Remover
To avoid personal injury, wear eye protection and rubber
13614Use OMC Gel Seal and Gasket Remover to remove all traces
of gaskets, adhesives, and OMC Gel Seal II from the cylinder block and crankcase5Carefully remove any carbon accumulation from the tops and ring grooves of the pistonA ring groove cleaning tool can be made by breaking an old ring and grinding an angle on its endDo not damage ring grooves while cleaning