1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 611Get this manual
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LOWE GEAR and BEARING ASSEMBLY REMOVAL NOTE: U'h!11 removing !apered roll er bearings, bearing cups and Spal'NS fro lou;er gear and drive shafL housingLhey must be leept in set as shown in Figure IIf