If your propeller is racing in rough...

If your propeller is racing in rough...

Question 1 of 3104866636ee728f7522a1c51826d

If your propeller is racing in rough weather, which action should you take?

Question 1 of 31048

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Q

If your propeller is racing in rough weather, which action should you take?

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🔍 Key Concepts

• Engine and propeller behavior in rough seas • Why a propeller might start racing (sudden loss of load when lifting out of the water) • Effects of over-speeding an engine and how operators usually protect machinery

💭 Think About

• What happens to engine load and RPM when the propeller comes partially or fully out of the water in heavy seas? • Which action would best protect the engine and shafting from damage when the propeller repeatedly loses and regains its load? • Between increasing, decreasing, or stopping the engine, which is most consistent with normal marine engineering practice in heavy weather?

✅ Before You Answer

• Understand that propeller racing = engine overspeeding due to loss of load • Consider which choice would reduce stress on the engine and shaft when the propeller alternately bites and loses water • Eliminate any options that would clearly increase RPM or shock loading on the machinery