hello, the problem is that when i run my motor at half throttle or so it cools down fine,(i also took out the thermostat to figure out a previous overheating problem). but when i go to full throttle it will get very hot very fast, a minute or so, if i back her down she cools right down. i did replace the impeller and i'm not sure why it would work fine, pump water, and then not at higher rpm. any insight would be great thanks
