1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 139Get this manual
1351 25The wrist pin fit is loose on both sidesPush the wrist pin through to free the piston from the connecting rodIf necessary, use OMC Pressing Pin PIN 326356 and OMC Piston Cradle PIN 326572 to remove the wrist pin bearing
1361 26Be careful not to lose any ofthe 28 needle bearings or the
two wrist pin washersIf any of the bearings are worn or lost, replace all 28 bearings during reassemblyPrior to inspection and assembly, thoroughly clean all powerhead internal components
Cleaning 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 cylinder hone to resurface wallsUse slow RPM to achieve strong "crosshatch" 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'" To avoid personal injury, wear eye protection and rubber