Have a 115 Etec Evinrude. Used to overheat whenever going into plane, getting speed. Changed full water pump kit, both T stats. Issue went away with 3 or 4 people max in boat, occasionally overheated at speed with 4, rarely. Thought problem was solved, took 7 people out, overheated whenever getting onto the plane, 30 secs into getting speed. At a loss of why.