so I replaced the engine, brand new thermostat. thought the gauge was bad. decided to do a dry/wet run..... nope. and I removed the inlet screen and I can't feel any suction at 1100 rpm with my finger on the tube. impeller????? if so how do identify which one I need and where do I get it/part numbers for the kit. I point to a small water leak in the first video, could this be the cause?