i have a 2006 stx-12f that overheats only when in the water. i have removed the pump and have no clogs going in or out of the pump. i have never had my ski in salt water at all. when i plug water into either side of the water filter intlet hose I get water going through the system. I can not make it overheat out of the water. Not sure what to do. i have not take the water pipe out that is under the intake. i plan on doing that tomorrow. What else can I look into?