If a two-stroke/cycle diesel engine is over...

Question 1 / 270705eccefa3bacbc34ba4d47e1b

Question 1 of 270705eccefa3bacbc34ba4d47e1b

If a two-stroke/cycle diesel engine is over speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?

Back

Question 1 of 27070

If a two-stroke/cycle diesel engine is over speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?

🔍 Key Concepts

• Diesel engine runaway conditions and why they can keep running without normal fuel injection • Difference between stopping fuel flow vs. stopping air supply on a diesel that is burning lube oil or vapor as fuel • Safety risks (explosion, catastrophic failure) if an overspeeding engine is not quickly starved of both fuel and/or air

💭 Think About

• If the engine is already burning lube oil drawn into the cylinders, will moving normal fuel controls immediately stop combustion? Why or why not? • Which action(s) directly affect what the engine actually needs to keep running: fuel from injectors, unintended oil fuel, and intake air supply? • In a real engine room emergency, what is the safest immediate way to starve a diesel that is self-fueling from oil mist or lube oil?

✅ Before You Answer

• Check which choices only affect injected fuel versus which affect intake air as well. • Verify which option would still allow the engine to run on lube oil alone if air is available. • Ask yourself: in a true runaway, which control can you realistically reach and use fast enough to avoid mechanical failure?

Question 1 of 27070

If a two-stroke/cycle diesel engine is over speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?

Move the fuel control mechanism to the no fuel position.

Block the fuel supply by closing the master fuel valve.

Shut off the fuel supply and block the flow of intake air.

Relieve all pressure in the fuel system.

Question 1 / 270705eccefa3bacbc34ba4d47e1b

Question 1 of 270705eccefa3bacbc34ba4d47e1b

If a two-stroke/cycle diesel engine is over speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?

Back

Question 1 of 27070

If a two-stroke/cycle diesel engine is over speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?