1989 Johnson Evinrude "CE" 9.9 thru 30 Service Manual, P/N 507754, Page 143Get 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 combustion chambers3 If cylinder walls are glazed from extended use, use medium grit hone to resurface walls Use slow RPM to achieve strongcrosshatch" 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
i gloves when using OMC Gel Seal and Gasket Remover
'" To avoid personal injury, wear eye protection and rubber
r:j6l Use OMC Gel Seal and Gasket Remover to remove all
traces of gaskets, adhesives, and Gel-Seal II 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 cleaning6 Thoroughly wash entire cylinder block and crankcase with warmsoapy water to remove all traces of contaminants