🔍 Key Concepts

• Diesel starting systems: how electric starters work and what affects cranking speed • Mechanical vs electrical faults: which problems stop the pinion from engaging vs which slow the rotation • Heat buildup in motors: what happens to a starter after repeated cranking attempts

💭 Think About

• Think about what happens to an electric starter motor when it is used many times in a short period: does it get cooler, stay the same, or get hotter? • Which option would mainly affect how fast the engine turns over (cranking speed) rather than whether it fires and runs? • Which fault is most related to engagement of gears, and which is related to the motor’s ability to produce torque after repeated use?

✅ Before You Answer

• Identify which choice mainly affects engine running after it starts rather than how fast it cranks • Separate faults that affect gear engagement (pinion-to-flywheel) from those that affect starter torque and speed • Consider the effect of repeated cranking on the starter motor’s temperature and performance