1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 140Get this manual
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EXHAUST SYSTEM INSTALLATION
T orqu exhau Ibow to tran om plate screws to 20-25 flIbs :-3A6mkgl
2F-9REMOVALINSTALLATION-AL NMEN T
Page: 140
Mercruiser Service Manu