Home > categories > Hydraulic & Pneumatic > Water Pump > I have a mercury 60 hp 4 stroke about 6y old and the water pump was working fine then just stop pumping water?
Question:

I have a mercury 60 hp 4 stroke about 6y old and the water pump was working fine then just stop pumping water?

water pump and thermostat were replaced 18 months ago motors done about 20 hrs since replacement have checked and there are no blockagers in water tube what could be the problem thanks

Answer:

change ever year rubber don,t last sitting on in the heat
Sounds to me like your impeller is shot. Just because the water pump was replaced, chances are the impeller wasn't.
well, if the water pump isn't pumping water, then the water pump is faulty. only way to know what's wrong with it is to open it up and look at it. one thing you might not be aware of, is that a few seconds of dry running is all it takes to damage the impeller, so if you've been in the habit of starting your motor without supplying water to the lower unit, then that's what happened. Another thing is, the pump sucks in sand and silt, those take a toll on the water pump; the more you run shallow water, the more damage is done.

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