Folks, on mercury 25M (2 stroke) I am having a strange problem with cooling. No water is coming out even if I remove the thermostat. Changed impeller and a gasket, still nothing. If I pour a stream of water through the thermostat hole into the shaft, water comes out down below which tells me that the passage is not clogged up. So if the impeller pushes the water up, how come it doent reach the heads? Any ideas?
