Understanding Evinrude water cooling and thermostat - Visualizing the water flow

Understanding how Evinrude watercooling and thermostat work.
This is a 1990's Evinrude 40HP Outboard.
www.marineengin...
Camera used:
Sony Alpha a6300 Mirrorless Digital Camera
amzn.to/2uAMYzi
Sony SELP1650 16-50mm Power Zoom Lens
amzn.to/2O7a48S
Sony VCLECU2 12-16 MM,f/2.8 Petal Shaped Fixed Ultra Wide Converter for SEL16F28 and SEL20F28
amzn.to/2mumFGm
Sony E 55-210mm F4.5-6.3 Lens for Sony E-Mount Cameras
amzn.to/2LexScT