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  1. C

    Over heating 1988 mercruiser 185 4.3

    This is the cooling sytem. I just replaced the thermostat (yes with correct marine one) and impeller. While testing I have it in a bucket that way water is not being shoved by hose. I'm getting plenty of water flow. I opened individual lines while running it and every line is getting water. The...
  2. C

    4.3 mercruiser overheating

    Just replaced thermostat in my 1988 4.3 mercruiser. There is cold water going to the thermostat but is still over heating. The hose that is disconnected bottom right in the picture has no water in it. The hose bottom left was full with extreamly hot water......what am I missing? My book doesn't...
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