Join Date: Mar 2007
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Yes, that is a mod that has been discussed off and on for a fair bit. No harm in bringing it up again here, though.
A lot of folks feel differently about that approach. Most engine raw water pumps do not handle debris very well --hence all the strainers, etc. So they would easily jam up if any debris came up from the bilge. Even a clean, ship shape bilge is likely to get fouled by debris in an emergency flooding situation -- bits of paper that go mush, particulate matter flushed by flooding waters from obscure crevices, etc etc.
So if you took that approach, it would be important to install some kind of strainer on the end of the hose led to the bilge. But even with that precaution, some feel it's not worth losing your engine to an overheat situation just when the situation is most dire. Others argue that if the alternative is losing the boat to sinking -- who cares?
But there is no argument with the claim that nothing will pump water like a diesel engine. That's why many marine engine manufacturers offer a separate option for a dedicated emergency pump, that mounts to the block much like an alternator and which is belt driven from a PTO. These pumps are designed to move higher volumes of water and are much less prone to fouling from debris.
If I ever felt the multiple electric and manual bilge pumps were not enough, that's the approach I'd take. But "suction salvage" might be a good last ditch option for some.
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Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT