bilge difficulty

Discussion in 'Boats and Motors' started by Warpath, Jul 8, 2005.

  1. I replaced my old bilge pump and hose. I went as far as upgrading to a 750 GPH unit from my 500 GPH. Well, I get it all hooked up and flip the works but it doesn't seem to be working very good. The voltage is fine, I double checked the connections and tightened the clamps, but the pump doesn't seem to push water the way it should. It isn't shooting water out the drain, it just trickles. Any suggestions?

  2. Need a little more info I think. Where is the pump and what is it used for? I have one at the base of my transom for filling my bait tank. It seems to create an air lock and won't work well until it "primes" itself. Does it sound like it's working well? Are the blades turning like they should?

  3. The bilge pump is much like your aerator pump for your livewell/baitwell. Except it pumps water out of the hull of your boat back out into the wilds. It's not a major issue since my boat doesn't leak any water, but if I get caught in a storm it would come in handy.

    The pump is larger than my aerator pump, but it doesn't pump water any better. It should stream out the side of the boat, but its just trickling.

  4. mrfishohio

    mrfishohio Recovering Fishaholic

    Do you have enough water in your boat to let the pump fill up & push water ?? If it's not in deep enough water, it will suck air and not push the water out. I know when I would use my pump in the rain, when it was about done, it would trickle, then I'd turn it off a few seconds & then back on & it would pump a little more out quick & then be done.
  5. I also noticed when I had one set up in my big bait tank at home that if there wasn't enough water in the tank it didn't work well. There needs to be a certain amount of water pressure to get it going good. I needed about 6" or more water above the intake to get it to work well.
  6. ncraft150

    ncraft150 Buckeye-Basser

    From the info given I doubt this is the problem, but if the wires are hooked up in reverse order the pump will turn in the wrong direction and not pump water out.
  7. Something I didn't consider. I was assuming we're talking about a thru-hull or transom mount pump. A submersible pump needs only a very small amount of water to work and is much better suited for what you need.
  8. katfish

    katfish Cats are where it's at!

    I believe ncraft150 has hit the nail on the head.

    Simply reverse leads to check for that problem.
  9. Another obvious thing to check is the outlet hose. Check for obstructions, kinks, or even holes.
  10. I am reluctant to reverse the leads until I ask this.....

    When I installed the new hose it was a heavier duty hose. I couldn't bend it like the other, old one I took off. When I attached to the outlet, it made an elbo in the line, like a trap in a sink. I'm wondering if it is causing the problem. I can always trim a few inches off, but I can't really see this causing that much of a problem.

  11. ncraft150

    ncraft150 Buckeye-Basser

    Think about it this way. If you bend a hose in half the water stops at that pinch point. Same thing with your pump. If it isn't pinched a 750gph pump would have no problem getting the water through.
  12. freyedknot

    freyedknot useless poster

    a good piece of advice too is keep your bilge area clean. a piece of paper or candy bar wrapper will clog it quickly,and it won't be working when you need it the most.
  13. Whaler

    Whaler Whaler

    Check everyone's theory and be sure the hose is not kninked. I would check the kinked hose first.
  14. If you suspect that the problem is a kink or blockage then try unhooking the hose on the pump and run it without anything hooked to it. It should shoot a good volume of water out. If it does not do so, then I would suggest trying to reverse the polarity of the leads. I think it could possibly pump a very small volume of water with the impeller spinning backward which sounds similar to what is happening. The most that will happen by reversing the polarity is that the pump spins backwards for a bit. With the pump unhooked from the hose this should eliminate any problems with installation. Beyond that I would head back to the store for an exchange.