I thought some people might be interested in my bilge pump install on my NDK Greenlander Pro kayak. I didnt weigh the parts but my guess is around 3.5 to 4 pounds total. One key to light weight is the battery. Its a LIPO or long version of name Lithium Polymer. Battery is only 13 ounces yet 14.8 volts and 2.450 amp hour. It does require a specialized charger which I allready owned for my RC planes.Less than $200 for whole setup. Everything I got was ordered online so shipping charges added up since everything came from differant places yet still under $200.
If you needed to buy a charger setup for LIPO battery I got mine from Hobbyking which is a place for RC planes and helos in Hong Kong, charger will set you back about 30 bucks for HobbyKing brand charger. It measures voltage of each cell as it charges battery.Battery was about $24 at same place. Under $200 doesnt include battery charger.
Youtube video of it pumping here http://www.youtube.com/watch?v=V42KTxThlpM&feature=youtu.be
Pictures of setup here http://www.pbase.com/dc9mm/kayak_bilge_pump
Overstock Outlet Foods
The Kayak Wing
EZ-Dock modular docks
Free Standing Boat Racks
URCHIN Portable Anchor
|Table of Contents|
|Messages in this Topic|
Posted by: clarion on Apr-03-13 9:23 AM (EST)
The LIPOs are interesting. I'd be surprised if the whole thing weighs 3-4 pounds though. I think that's about what my lead acid battery setup weighs. But I never actually weighed it.
Posted by: booztalkin on Apr-03-13 11:04 AM (EST)
What is the black material holding the tubing & wiring in place?
Posted by: dc9mm on Apr-03-13 11:54 AM (EST)
The material holding the tubing and wiring is Neoprene closed cell foam 1/8 inch thick. Glue used was Lexall. Link to were I got foam http://www.foamexpress1.com/Closed_Cell_Foam.php
how fast does it pump?|
Posted by: RubricOfRuin on Apr-03-13 1:29 PM (EST)
Not to be a pain in the you-know-what, but I don't see the use of an electric bilge pump. imo, it does not pump fast enough to empty the boat full of water quickly in a sticky situation, electrical things and water do not mix well even when isolated - salt water has an annoying tendency to get everywhere, batteries tend to go flat over time and most importantly, if you don't have the skill to empty and re-enter without aids you should be placing yourself in sticky situation and put your faith in a machine. I don't carry a pump either, because found it useless in training. Much easier to flip the boat upside down, kick with your legs, raise the bow and flip the boat over, emptying it in the process and then cowboy scramble into it. Given, never done that with a boat loaded with gear.
Faster than hand pump|
Posted by: dc9mm on Apr-03-13 2:25 PM (EST)
I guarantee this Rule 500 gph pumps faster than ANY hand pump. As far as safety its way better than a hand pump.
not saying it does not work|
Posted by: RubricOfRuin on Apr-03-13 6:49 PM (EST)
There is a place|
Posted by: rjd9999 on Apr-11-13 1:40 AM (EST)
for an electric pump in kayaks. It doesn't mean you don't bring your manual pumps as well, it just means that, when it is working, you have the ability to empty the boat and still have one's hands free for other activities.
Posted by: nickjc on Apr-03-13 3:21 PM (EST)
I built one in my old tiderace. The guy who created nwpaddling.net is a paddling partner of mine. Ours have lasted a long time with no issues. THe lipo battery stays charged for a long time. Probably 5-10 people in our kayak group have them now. We still carry hand bilge pumps behind the seats or under the deck as a backup. We get the most use out of them in surf sessions when waves constantly breaking over the boats slowly fill up your cockpit. And of course during rescue practice.
Thanks for the tip|
Posted by: dc9mm on Apr-03-13 3:37 PM (EST)
Thanks for the tip on Pelican case. I have had this kayak only one summer but in that time have never gotten a drop of water inside day hatch and that's were my Pelican case with battery inside it is mounted.So not real worried about water inside case.But I will keep an eye on the case just to be sure. I could always have the day hatch cover off and get flipped. Ya never know.
that long outlet hose|
Posted by: gnarlydog on Apr-03-13 6:32 PM (EST)
can I ask you the reason for the outlet hose running all the way to the front of the cockpit?
Posted by: dc9mm on Apr-03-13 8:38 PM (EST)
not bad energy balance for the system|
Posted by: RubricOfRuin on Apr-04-13 3:36 AM (EST)
Please cut the guy some slack.|
Posted by: flynhi4u on Apr-04-13 8:09 AM (EST)
I am sure to catch flak for this. Do we always have to be so critical of everyone? It was his boat and he chose to modify it to better suit his needs. No one got hurt and maybe someone will even benefit from his post. What is wrong with adding more safety gear to his boat. Some of you carry spare paddles, why can't he have a an electric pump?
He who laughs last laughs best|
Posted by: Jaybabina on Apr-04-13 8:57 AM (EST)
All of these wonderful self rescue/draining methods don't work in the surf zone. It's reentry and roll and get the heck out of there with a boat full of water.
not from me|
Posted by: RubricOfRuin on Apr-04-13 6:27 PM (EST)
I'm not critical of installing a pump or having a spare paddle or anything else for that matter. But the sad truth is that give a souped up kayak with an electric pump to a person with "average" skill and they will just might think that ocean is knee-deep. It's a good thing manufacturers are oblivious to some things - imho, it actually keep people alive by keeping them a bit scared (as they should be). Once they built an unsinkable ship and called her "Titanic". Overconfidence kills more often than complete lack of skill.
Posted by: gnarlydog on Apr-04-13 11:41 PM (EST)
Here Downunder we often paddle in the ocean where landing, if a storm approaches, is not always so fast with cliff lines that stretch for miles.
Posted by: slushpaddler on Apr-09-13 4:42 PM (EST)
pro and con|
Posted by: booztalkin on Apr-04-13 10:52 AM (EST)
What I liked about the front-hose/outlet is that everything but the battery is in the cockpit. This limits the need to seal where the hose would pass through the bulkhead and the possibility of leakage.
Very nice! But switch position?|
Posted by: Kocho on Apr-05-13 10:40 AM (EST)
Don't you hit your knuckles on that slider in the off position? Also, I think you can add a knot or some other stopper on the bungee to limit the sliding so that you know where the switches are without looking. Lastly, if you put a paddle or pump or something else under the front bungee, won't the slider lift and not activate the switch?
Posted by: dc9mm on Apr-05-13 12:04 PM (EST)
"Don't you hit your knuckles on that slider in the off position? Also, I think you can add a knot or some other stopper on the bungee to limit the sliding so that you know where the switches are without looking. Lastly, if you put a paddle or pump or something else under the front bungee, won't the slider lift and not activate the switch?"
electric pump in action|
Posted by: nickjc on Apr-05-13 12:14 PM (EST)
Here's a nice vid of commercial version of gnarlydog's pump in action at skook. And some hand pump action for comparison.
Pump in action|
Posted by: dc9mm on Apr-05-13 2:28 PM (EST)
Yes I saw that video before I decided on my pump install. Much better video than mine, lol. I did my pump myself(no kit) because they want 400 bucks for that kit plus it uses a Lithium Ion battery. Lithium Polymer is better battery.Plus I already owned the special charger for LIPO batteries.
Posted by: yakwise on Apr-06-13 10:39 PM (EST)
Been meaning to do this for a while. As several people mentioned, it's really best for higher level kayakers who can roll and re enter and roll. Even on a surf launch waves can get in before you get your skirt on. It's just one more layer of defense, just like rescues and self rescues the more options you have the better.
And there is always cheap, down, and |
Posted by: DUUJ on Apr-09-13 3:49 PM (EST)
Posted by: slushpaddler on Apr-09-13 4:43 PM (EST)
Beautiful boat BTW. I love the color combo.
like it BUT|
Posted by: jeffers on Apr-15-13 4:09 AM (EST)
i really like the pump very nice. tempting to let some water in to surprise some people going by. my only concern is the lipo. i have seen plenty of these burn up and exploded a couple of my old ones (on purpose). what do you have set up so you dont overdraw the lipo when it is low on charge or in case it stays on too long?
Lipos are safe|
Posted by: dc9mm on Apr-15-13 12:06 PM (EST)
Lipo batteries have a possibility to catch fire when there being charged not in use unless you draw to much out of it too fast. I have a 3 amp inline fuse to protect from that. Battery doesnt even get warm for what I draw from it pumping.