1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 402Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 402

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SEAWATER COOLING SYSTEM

Seawater Inlet Recommendations
Transom Mounted or Thru-Hull Seawater Pickups and Hose
Water pickup must be large enough to permit sufficient water flow