Unit 3: Main Propulsion Units (IC Engines & Others) Advertisements Internal Combustion (IC) Engine,Cycle of Operations/ Working of 2 Stroke Cycle Diesel Engine Scavenge Fires:(What is Scavenge Fire,How Scavenge Fire occurs, Effects of Scavenge Fire,Actions to be taken if a Scavenge Fire occurs) Cooling Water System Jacket Cooling Water System and Piston Cooling Water System Operations of IC Engine as Main Propulsion Engine: Operations of IC Engine as Main Propulsion Engine: