New to site, but have a problem with a mercury 150 xr4 v6. Starts and idles good (but seems to be cold natured) ashore. When in the water it will start ok and as long as I ease off it will do ok, but when I try to plane off fast it seems to lose power. I am now getting a beeping noise. It does not overheat just changed water pump and spark plugs. But it did not help. any one know what else it could be?
Thanks
Thanks