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  1. M

    Yamaha Sterndrive 5.7l Overheating

    I used a garden hose when I had the hoses off and water came out of the back of the boat when putting the hose on each exhaust cooling hose inlet.
  2. M

    Yamaha Sterndrive 5.7l Overheating

    Hi everyone, I bought this boat new in 1991. I know the cooling system fairly well. I have replaced the raw water pump impeller 6-10 times over the years. This year I replaced the raw water pump impeller and took the boat out. It ran fine with no cooling issues. We ran the boat for over an hour...
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