1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 184Get this manual
POWERHEAD Move piston pin tool to top of piston pin bore and center piston pin in piston
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aPiston Pin Tool (91-13663A1)Piston pin 5Install new lockrings into grooves in both ends of piston pin bore6Install connecting rods onto crankshaft as follows: aApply 2-4-C with Teflon to connecting rod big-end bearingsIMPORTANT: Replace roller bearing halves as setDO NOT use old and new halves togetherbPlace both halves of connecting rod big-end roller bearing onto crank pin