How to cool down a water cooled engine?

Effective Ways to Cool Down a Water-Cooled Engine

First, reduce the throttle, but ensure that the water is still circulating and that airflow remains high. A recommended approach is to coast to a stop while maintaining the engine at a moderately fast idle. To rapidly draw heat away from the engine, it's crucial to have water flowing through the radiator, significantly enhancing its cooling capacity; however, this method does carry some risks.