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I am having a lot of trouble with my 1990 yamaha overheating. It has less than 700 hrs. It started with getting the boat up to 25 mph and I got the overheat alarm and the motor slowed down to a fast idle. Water was coming out of the p hole. Changed out the water pump and still the same result. I...
My yamaha 150 runs perfect at mid range at below 30MPH. When I get to full speed at above 40 MPH the alarm comes on and the engine speed drops. If I turn the motor off and let it rest for a minute, I can start it back up and the motor runs fine. Got a water stream at the drain hole. I have made...
