I recently replaced the impeller in my 1979 351 PCM Ski Supreme, because it was overheating; the impeller which was replaced had all fins broken off. The placement of the new impeller has NOT corrected the problem. When I used 'Add-A-Lake' to test, I had the opportunity to visually inspect the new running impeller, and it was turning; however, there was absolutely no water in the pump or lines. I then disconnected, inspected, and s***** all water intake hoses from the intake grate to the water pump. No obstructions were found. The boat was also put back into the actual lake and started, only to be met again with overheating. What other issues can cause no water uptake and overheating? With the limited knowledge that I have, it would seem that if there is a new working impeller and no obstructions in the incoming water lines, that there should be no problem with the cooling water intake system; BUT I COULD WRONG . :rolleyes: THANK YOU !!