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post #8 of Old 04-17-2013
casey1999
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Re: Exhaust Manifold Flooding with Cooling Water

I thought about the same thing. Have an electric pump as a back-up to the engines mechanical pump. Even thought about using a cheap bilge pump to pump the sea water through the engine. But then I thought about this: The engines mechanical pump flow rate is proportional to its speed. The faster the engine goes (rpm) the higher the mechanical pumps flow rate, and the more cooling water the engine needs (to disipate the higher heat at higher hp output). In would be imposible for an electric pump to do this (unless you want to install a Variable Speed Drive on it). With an electric pump you could flood the cylinders at low or no RPM.

So now I carry a new spare mechanical water pump- should take no more than 30 minutes to change out (and probably more like 15).
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