1974 Johnson 25HP Outboards 25R74 25E74 Models Service Repair Manual JM-7406, Page 42Get this manual
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5-5 REFERENCE PICTURE ROLLER BEARING AND SEAL
Figure 5-11 Removing Wrist Pin Retaining Ring
One side of piston is marked "LOOSE" insideSee 5-12 When wrist pin is to removed,