1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 59Get this manual
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DRAINING and FILLING DRIVE UNIT WAR NING: NOT remo ve vent or il ler ug wh en drive is hol rom pera tio Ex-pand ho gear hlbricanl wo uld rel e35 Cd thru pl ug hoi le:k OW"
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