1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 505Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 505

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+Figure 6 Critical Valve Dimensions
VALVE STEM CLEARANCE

1 Measure valve tem clearance (F igure 8) as follows:
C lamp dial indicator on one side of li nder head rocker arm cov