I think you are mistaken. One of the three that was out before averages 2 points. McCormack played tonight. Not sure of the other player. USC is very good....and I hate to say that. Kansas is always overrated
Oregon State played great down the stretch including winning the Pac 12 tournament against some very good teams. Late bloomers for sure and are playing great.
That right there points to your impeller. At higher speeds, water is forced into the drive and the impeller blades flatten out so they are actually doing less. At low speeds where the impeller does more work, it is not pumping enough water.
What muffs are you using? Turning the water on full I hope?
Correct me if I am wrong but the Blue flush port is after the impeller. There should be no water going out your drive inputs when using the flush port. You need to pull your impeller.
Normal for one side to be hotter.
Next time you are in the water testing, put the engine at 100RPM. Remove the hose at the thermostat housing and output the water from that hose into a bucket for exactly 15 seconds. Should get around 2 gallons of water or so.