I have a 1989 120 hp johnson , not sure if impeller/water pump is working or working well,,, boat is still on trailer, with hose hooked to it no water from tell tale, removed the thermostats n gaskets n replaced covers a ran the boat for a few seconds, had water leaking from t-stat covers, gave it a little gas a had even more water leaking from covers,,also had a few drips of water from the tell tale,,,installed new thermostats and still no water from the tell tale,,,any advice/help on what the trouble could be would be much appreciated,,,