1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 169Get this manual
Cleaning
1 1Before Note
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 combus tion chambers 3If cylinder walls are glazed from extended use, use medium grit hone to resurface walls Use slow RPM to achieve strong "crosshatch" pattern for best oil retention and ring sealing
To avoid piston or cylinder block damage, restore the chamfer to all port edges using ball hone or other suitable toolTo avoid personal injury, wear eye protection and rubber gloves when using OMC Gel Seal and Gasket Remover
1 2314Use
OMC Gel Seal and Gasket Remover to remove all traces of gaskets, adhesives, and Gel Seal" from the cylinder block and crankcase5Carefully remove any carbon accumulation from the tops and ring grooves of the pistonsA 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