1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 405Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 405

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SEAWATER COOLING SYSTEM

1 Seal the inside edges of the 1-12 in(38 mm) hole hose fitting2 Be certain hose fitting and plastic plug are in place and threads have been sealed with Loctite Pi