1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 138Get this manual
CleaningAll Models
1Note Before
inspecting or assembling powerhead, all internal components must be perfectly clean and free of contaminants1Remove any carbon accumulation from exhaust port areas
2Remove any carbon accumulation from cylinder head combustion chambers3If 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
4Use OMC Gel Seal and Gasket Remover to remove II traces of gaskets, adhesives, and Gel Seal II from the cylinder block and crankcase