1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 157Get this manual
f21l 23Carefully remove the pistons from the cylinder blockProtect the condition of the piston by packing paper towels between the connecting rod and pistonDo not allow the connecting rod to touch the inside of the piston or the cylinder wall 1221 24Using an appropriate ring expander, remove piston rings
from both pistonsr:;:;] 25Using tool as drawn on Page 4-8 or OMC Retaining Ring
Pliers, PIN 325937, remove all wrist pin retaining ringsDiscard retaining rings
12411251 26The fit between the wrist pin and bosses ofthe piston