🔍 Key Concepts

• diesel engine cooling and temperature changes • what happens to metal engine parts and turbochargers right after heavy load is removed • purpose of idling before shutdown on marine diesels

💭 Think About

• Think about what part of the engine is most affected if you go from full power directly to zero and stop the engine immediately. • Which choice is related to temperature and heat, rather than fuel flow or control systems? • Ask yourself: why do manufacturers recommend a cool‑down period after running at high load?

✅ Before You Answer

• Focus on heat and cooling effects on engine components. • Consider whether idling affects fuel line pressure after shutdown. • Think about how idling changes metal temperature gradients inside the engine before it stops.