1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 796Get this manual
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POWER SHI FT DESCRIPTION The Powe hift cyl ind is ac um-a uate cy lind er wh ic 15 ed ss is he mec icashi ft ng he va uu is prod ced in th in tak ma nifo ldth en is iped to he hift cv lind hr hos s