What are the starter time limits?

• A. Sequence: 60 seconds on, 60 seconds off; then 30 minutes off
• B. Sequence: 5 seconds on, 5 seconds off
• C. Sequence: 2 minutes on, 2 minutes off
• D. Sequence: 60 seconds on, 30 seconds off

Answer: (A)

Starter duty cycle limits for the PC-12 NGX’s starting system specify how long the starter can run and how long it must rest between attempts. The correct sequence allows 60 seconds of cranking, then 60 seconds of rest. If another start is needed, you wait 30 minutes off before trying again. This arrangement protects the starter and electrical system from overheating and wear, especially after multiple cranking attempts. Short bursts like 5 seconds or 2 minutes without the proper rest can overheat the starter, while 60 seconds on with only a brief off period doesn’t give enough cooling for repeated starts. The 30-minute off interval provides a safe, substantial cooldown if extra attempts are required.