What cannot cause the engine to not crank?

An engine being flooded is typically associated with too much fuel in the engine, which can prevent it from starting properly, but it does not prevent the engine from cranking. Cranking refers to the activity of the engine's components when the ignition key is turned or the start button is pressed, resulting in the engine's internals being rotated. If the engine is flooded, it may be difficult or impossible for the air-fuel mixture to ignite, but the starter motor can still engage and turn over the engine.

In contrast, other options like a weak battery, faulty ignition system, and defective starter motor can all directly prevent the engine from cranking altogether. A weak battery may not provide sufficient power to engage the starter motor, while a faulty ignition system can prevent proper signal transmission necessary for the cranking process. Lastly, a defective starter motor can fail to engage the engine even when the key is turned, thus stopping the cranking action from occurring. Therefore, while flooding can impede the engine's ability to start, it does not inhibit the cranking process itself.