1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 530Get this manual
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CAMSHAFT LOBE LIFT C heck li ft of ach lobe in co nsec tive orde aod make note of read ings Re move va Iv roc ker rm cov r(s) 2 Remov ro ker arm stud nu ball unit nd rock arm adaptor for ball -end pus