1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 208Get this manual
Cleaning
rN=J Before
inspecting or assembling powerhead, all internal components must be perfectly clean and free of contami-
1Remove 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 cylinder hone to resurface wallsUse slow RPM to achieve strong "crosshatch" pattern for best oil retention and ring sealing
avoid piston or cylinder block damage, restore the chamfer to all port edges using ball hone or other suitable
i gloves when using OMC Gel Seal and Gasket Remover
To avoid personal injury, wear eye protection and rubber
1281 4Use 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 pistonA ring groove cleaning tool can be made by breaking an old ring and grinding its end to an angleDo not damage ring grooves while cleaning