1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 384Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 384

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PUMP ADJUSTME NT (Fi gure ll)
1 Place cam follower on secon step of fast idLe cam and against high stepRotate choke valve toward closed position by pushing down lightly on vacu um break lever2 D