If the engine fails to start within 15 seconds, what should be done?

If the engine fails to start within 15 seconds, the proper protocol is to release the starter switch and allow it to cool for 15 seconds. This action is crucial because excessive cranking can lead to overheating the starter motor, which can cause damage to the starter and potentially lead to a more significant mechanical failure. By allowing the starter to cool down, you prevent potential overheating and prolonged wear, ensuring that the starter motor remains functional for future attempts. After the cooling period, it would be appropriate to attempt starting the engine again, as long as any other issues, such as fuel or electrical problems, have been ruled out.

The options related to trying immediately to restart, checking fuel levels, or contacting maintenance, while potentially useful actions in certain situations, do not address the immediate need to protect the starter motor from overheating. Conducting these actions consecutively without first allowing for a cooling period could exacerbate any mechanical issues.