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Old 21-02-2016, 11:48   #16
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Re: Dewatering Pump

Originally Posted by leftbrainstuff View Post
That's quite a beast. Similar and much larger navy damage control pumps are all mechanically driven for reliability and portability. I couldnt follow the link. I assume its powered from a mains AC supply.

2.2kW will overwhelm your average cruising yacht inverter. That is also quite a load for the average genset.

What size inverter, battery bank and genset are you using?

We certainly couldn't run that pump with our 2500W inverter, 675Ahr battery bank or 1cyl 6kW genset with a 130A 12V alternator.

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Yes, this is not a solution for everyone.

Every power source has certain pluses and minuses, and certain risks that it won't work when you need it. You might not be able to start the engine of an engine-driven pump; you might not be able to get electrical power into an electric one.

Our particular boat, which may be different from others, has a robust AC power supply which can power that beast fairly easily. The generator is a 6.5kW Kohler 3-cylinder heavy duty one. Actually a derated 8kW generator with a 1000cc Yanmar engine. It won't even notice a 2.2kW load. It will put out 6.5kW 24/7/365 -- literally, as it's rated as prime power -- for continuous duty at 100% rated capacity.

That's what my money is on if the chips are down. It lives high above the waterline and would not get swamped until the boat is already basically sunk.

I could also power it from the inverter (3000 watts, from a 420 amp/hours @ 24v battery bank or from the 2.5kW school bus alt on the main engine).

For my particular system, that seems a better bet then an engine-powered one.
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Old 21-02-2016, 12:42   #17
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Re: Dewatering Pump

"Anyone who has ever used a bilge pump in anger knows that they quickly clog up, because flooding washes all kinds of carp out of even the cleanest bilge."

If you are a sporting man, may I suggest using dough-balls mixed with peanut butter or perhaps canned corn . . . it's the best bait for carp I know! Good luck and tight lines! P.S. be careful not too set the hook too hard . . . they have a soft mouth, you know.
"And those who were seen dancing were thought to be insane by those who could not hear the music."
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