Dear Forum thanks to your help I have my Merc 700 working great, all new electrics. Starts and runs well. noted on the water yesterday that indicator stream was poor. when I flushed it after a day on the water, only air bubbles came out with a little water. I installed new impeller in already new water pump complete kit and housing only short time ago. Pulled pump off for second time, impeller correctly installed anti clockwise, drops into gear ok, tried pump in drum of water no go. back flushed motor top to bottom, water comes out bottom. Any ideas? cracked water channel perhaps. Feeling a bit dismayed. Motor bottomed hard on sand bar last day out my crazy daughter was driving, Is that likely to cause a problem? motor swung freely when ran aground, very little sand in cavity. many thanks key way correctly in place.