Hi, I am having problems I have a force 85 after about 45 to 50 minutes on the water it loses power I was told its over heating so I changed impeller and checked thermostat it opens at 110F it runs good for the first 45 min no problems then it just shuts down it will start right back up but will only run at low throttle you give it more than half and it shuts down again almost seems like it is starving for fuel i'm at a loss can any one help thanks