1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 147Get this manual
f8l1gl 7Carefully lift the connecting rod, wrist pin bearing, and lower thrust washer off the wrist pin without disturbing the needlesAdd the upper thrust washer, flat side up, and place the assembly inside the pistonCarefully align all pieces and push the wrist pin downward8Finish installing the wrist pin through the connecting rod and the piston until the wrist pin contacts the installed retaining ringBe sure none of the needle bearings have been disturbed or pushed out of the connecting rodInstall the remaining retaining ring as described in Step 3r,Ql 9Install piston rings on each pistonSpread each ring with ring expander just enough to slip it over the head of the piston and down into place10Coat pistons, rings, cylinders and OMC Ring Compressor