1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 171Get 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 hone to resurface wallsUse slow RPM to achieve strong "crosshatch" pattern for best oil retention and ring sealing
1 To Note
avoid piston or cylinder block damage, restore the chamfer to all port edges using ball hone or other suitable toolinjury, wear eye protection and rubber groves when using OMC Gel Seal and Gasket Remover
11 To avoid personal