1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 169Get this manual
Cleaning
INote components must be perfectly clean and free of Before inspecting or assembling powerhead, all internal
contaminants 1Remove any carbon accumulation from exhaust port areas2Remove any carbon accumulation from cylinder head combus ti on chambers 3If cylinder walls are glazed from extended use, use medium grit hone to resurface walls Use slow RPM to achieve strongcrosshatchpattern 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 tool
i gloves when using OMC Gel Seal and Gasket Remover
'" To avoid personal injury, wear eye protection and rubber
4Use OMC Gel Seal and Gasket Remover to remove all traces of gaskets, adhesives, and Gel-Seal" from the cylinder block and crankcase 5Carefully remove any carbon accumulation from the tops and ri ng 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 6Thoroughly wash entire cylinder block and crankcase with arm, soapy water to remove all traces of contaminants