1997 Johnson Evinrude "EU" 90, 105RW, 115, 150, 150W, 175 60 LV Service Manual, P/N 507268, Page 155Get this manual
24Remove center main bearings and split sleeves for inspection25Using an appropriate ring expander, remove all piston rings from pistonsDiscard the rings
1231 1241
26Using tool as drawn on Page 4-6, remove all wrist pin retaining ringsDiscard retaining rings
27The wrist pin fit is loose on both sidesPush the wrist pin through to free the piston from the connecting rodIf necessary, Driver, PIN 318599, and Piston Cradle, PIN 326572, use to remove the wrist pin bearing
28Be careful not to lose any of the 28 needle bearings or the two wrist pin washersIf any of the bearings are worn or lost, replace all 28 bearings during reassembly1Note Prior to inspection and assembly, thoroughly clean all powerhead internal components
Cleaning
INote 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 cylinder hone to resurface wallsUse slow RPM to achieve strong "crosshatch" pattern for best oil retention and ring sealing