1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 101Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 101

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377 CID6.2L ENGINES
The valves and valve springs are heavy-duty to withstand the high engine speeds encounteredValve tips have been hardened to extend valve lifeHydraulic valve lifters ride dire

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