A jacket water pre-heating pump circulates warm freshwater through the engine’s cooling jackets when the engine is stopped. Its purpose is to maintain the engine at the correct standby temperature—usually around 60–70°C—so the engine is always ready for quick starting and to avoid thermal shock. #JacketWaterSystem #MarineEngineering #ShipEngine #EnginePreHeating #EngineStartUp | Engine Room Insight | Facebook
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