MerCruiser GM 5.0L/5.7L V8 - Half Systems
Mercruiser 1/2 System Fresh Water Cooling Systems
Mercruiser Closed Cooling System features and Terminology
Marine engines were never intended to be operated in an environment where corrosive salt water would be used to cool the engine. Due to this we recommend installing a Fresh Water Cooling Systems in an effort to protect and prolong the life of your engine.