1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 522Get this manual
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CONNECTING ROD BEARINGS Co nn ec ting rod bear in gs are pre cisi insert type and no utili shim for djustmenlDO :"iOT FI LE ROD If clearan ce are found to be cxcessiv ROD new baring will be requi redB