PaddleWise by thread

From: Dickson, Dana A. <dana.dickson_at_unisys.com> subject: RE: [Paddlewise] Electric Kayak Pump Date: Tue, 13 Jul 1999 08:53:20 -0500 · This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:33:00 PDT

I have a Rule 1100 pump and a 12 volt 7 amp-hour lead acid gel cell battery
in my boat.  Battery weight is about 6 1/2 lbs.  Now that I have solved the
water in the switch problem I reported in the earlier thread the pump works
great.  At low voltage the pump will run at less than its rated capacity,
but it will still be much faster than hand or foot pumping.  An electric
pump also lets you focus on keeping the boat stable a definite advantage
with a boat that is unstable due to a cockpit full of water.

I have used my pump with gel cells rated as low as 1.2 amp hours and had the
pump work fine.  The Atwood pump in the SK article draws much less amperage
than my pump but uses about the same amount of power to drain the kayak.  It
has something to do with laws of physics. My setup is also different than
the one in the article in that I have a fuse in the circuit.

I like many of the ideas in the SK article.  I am going to move my battery
to the rear compartment and put the switch on the backdeck.  

Dana Dickson

> -----Original Message-----
> 
> Date: Fri, 9 Jul 1999 21:54:58 EDT
> From: C1jaygo_at_aol.com
> Subject: [Paddlewise] Electric kayak pump
> 
>      Has anyone read the new Sea Kayaker magazine article 
> about using an 
> electric pump in a kayak.  As an experiment I purchased the 
> pump and some 
> different size batteries.  The pump mentioned from the 
> article (Atwood V450,  
> $13.00 at West Marine) weighs only about one or two pounds.  
> For a tiny 12 
> volt motor like this what would the best battery be to use?  
> The article says 
> to use 8 C Nicad batteries, 1.2 volts each, this only adds up 
> to 9.6 volts.  
> Would this hurt the motor by using less than twelve volts.  I 
> tried two 6 
> volt lantern batteries, the pump was flying.  Then I used a 
> single 9 volt 
> battery, this had a bout 3/4 the output and lasted for a 1/2 
> hour.  I'm going 
> to hook up the two 6 volts again two see how long they'll 
> last.  Could some 
> one tell me what the real difference are between these 
> batteries.  The 6 
> volts are two pound each and I think the 9 volt weighs about 
> one ounce.  I 
> filled a bucket with five gallons of water and the tiny 
> little pump emptied 
> it in less than one minute!  This could really be worth while 
> in open water.  
> But I would still bring a manual pump for backup.  
> Jamy
> 
> ------------------------------
> 
> Date: Fri, 9 Jul 1999 22:43:44 -0400
> From: "Robert Woodard" <woodardr_at_tidalwave.net>
> Subject: RE: [Paddlewise] Electric kayak pump
> 
> >      Has anyone read the new Sea Kayaker magazine article 
> about using an
> > electric pump in a kayak.
> 
> Hi Jamy,
> 
> See:
> 
> http://www.paddlewise.net/topics/boatequip/elecpumps.html
> 
> For a previous discussion here about electric bilge pumps. In there, I
> mention a gel cell 12v battery. I can now "highly" recommend 
> such a set up.
> I moved the battery to the rear hatch and used a boat trailer 
> light quick
> disconnect so I can easily install or remove the battery. The 
> battery is
> attached by wide velcro on the bottom and one side. I rolled 
> many times last
> weekend without the battery coming loose from the velcro.
> 
> The battery is about the size of a single 6v lantern battery...
> 
> Woody
> 
> 

***************************************************************************
PaddleWise Paddling Mailing List
Submissions:     paddlewise_at_lists.intelenet.net
Subscriptions:   paddlewise-request_at_lists.intelenet.net
Website:         http://www.paddlewise.net/
***************************************************************************