1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 465Get this manual
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VALVE STEM OIL SEAL andor VALVE SPRING REPLACEMENT
tn place
et 'a ve sprin and dam perva lve hie ld and va lve ap (or rotator) in placeClose -coi led nd of pring is installed agains