1968 Evinrude Big Twin, Big Twin Electric, Lark 40 HP Outboards Service Manual, Page 49Get this manual
One side of piston is marked "Loose" insideSee Figure 5-17When wrist pin is to removed, "Loose" side of piston must and driving to01 must applied to 100se sideA1ways drive from 100se side to tight side, being carefu1 not to distort pistonSee Figure 5-18 Figure 5-15Removing Center Bearing hLift retaining ring out of groove and slide aside to remove crankshaft main need1e bearings for ing and inspectionSee Figure 5-15 iRemove the rings from the pistons prying the ends 100se enough to grip them with pliers and then breaking them away from the pistonDO NOT try to save the rings even when they not stuckInstall comp1ete set of new rings every power h,e ad service jobjRemove wrist pin retaining rings, using Truarc No1 pliers (Specia1 #303857)See Figure 5-16Drive wrist pin through to free piston from connecting rod