Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 136Get this manual
13After removal, reassemble each piston and connecting rod assembly 16Using an awl, scribe identification number of connecting rod on inside of piston (1) Reassemble pis- ton on same connecting rod
CAUTION
Each connecting rod and end cap are matched machined set and must never be mismatched
17Using 1001(91-52952A 1), remove piston pin lock- rings from both ends of piston pinNever re-use piston pin lockringsin "Cleaning and