🔍 Key Concepts

• Difference between cranking and starting/running on a diesel engine • Role of the starting system (battery, cables, starter motor, solenoid) versus the fuel system • What it means if an engine can be barred over by hand but not turned by the starter

💭 Think About

• Ask yourself: If the engine can be turned by hand, what major type of problem can you probably rule out? • Which of the choices affects whether the engine turns over (cranks) versus whether it fires and runs after cranking? • Which component must work correctly to provide enough power and good connections for the starter to spin the engine?

✅ Before You Answer

• Identify which choices relate to the electrical starting circuit versus the fuel system or governing/speed control • Confirm that a problem with fuel delivery usually shows up after the engine is already cranking • Make sure the option you pick could realistically prevent the engine from cranking at all, even though it turns freely by hand