Engine Starter Cranking Limits for the second engine are?

• A. 90 seconds ON followed by 10 seconds OFF
• B. 90 seconds ON followed by 5 seconds OFF
• C. 60 seconds ON followed by 10 seconds OFF
• D. 120 seconds ON followed by 10 seconds OFF

Answer: (A)

Durability of the starter during an engine start is managed by a defined cranking duty cycle. For the second engine, the allowed sequence is 90 seconds of cranking, then 10 seconds off to let the starter cool before the next try. This cooling period prevents heat buildup that could damage the starter motor or the electrical system and helps ensure the engine starts reliably. The other timings don’t match this published limit—either the cranking period is longer than allowed or the rest period is too short—so they aren’t correct.