Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
fasternu

battery/trolling motor problem

5 posts in this topic

I have a Minnkota 12v 55 lb thrust bow mount. I was using it and it ran great, then after about 35 minutes, it slows way down, and the battery reads dead. I let it sit for about 30-45 minutes, the battery reads 2/3 full, and the motor works fine again for a bit, then repeats this problem.

I figured it was a bad battery, so I charged it, then took it and had it load tested. They said it was fine.

My question is, could the battery still have a bad cell or something that would allow it to read fine, even though it doesn't hold a charge, or do you think I have a short with the trolling motor.

I have a 40 amp breaker on the hookup. Should I try a 60 amp braker?

Share this post


Link to post
Share on other sites

Is the breaker popping? If that is not happening then the breaker is fine. I would suspect that you have a bad battery, my question would be how did they do a load test? was it with a digital load tester or an old style toaster type?I would also check the connections for the ground, you could be lossing some conductivity there. Good luck

Share this post


Link to post
Share on other sites

Ground is good, I already checked. No, the breaker isn't popping, but it is getting warm. The load test was done on an old style tester. I think it's a bad battery as well, just trying to be sure. Thanks for the help.

Share this post


Link to post
Share on other sites

It sure sounds like a bad battery to me as well.

marine_man

Share this post


Link to post
Share on other sites

Standard load testing is not a good test for deep discharge batteries. Load testing only tests the cranking amps which is the immediate surge that the battery is capable of producing and in my experience has little to do with the reserve capacity. While it will tell you if you have a bad cell it will not tell you anything about the reserve capacity.

Last summer my trolling motor battery would not run very long so I took it back to the store where I purchased it because it was still under warranty. The load testing came back within what the manufacturer specified so they would not cover it. Bought a new battery and it lasted 3-4 times longer under the same load conditions. I wrote the manufacturer but received no response.

To my knowledge the only way to test reserve capacity is to drain the battery slowly and measure the output.

[note from admin: please read forum policy before posting again. thanks!]

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    • I guess I never associated a north wind wind lower pressure. Or a south wind with higher pressure.  Learn something new everyday
    • I watch when it drops below 29.5 Hg on down (29.0 Hg or mb; millibars) or when it swings up past 30.0 mb. That's my reference for "highs" or "lows" on my Barometer. Remember to adjust yours to your local Wx reading, they have a slot shaft in the back of the meter for that. I  love my old dial Aneroid barometer.  They last forever, too.  Mines kicking about 35 years... (That's not mine, pic is for low and high reference...)    
    • Thanks Rebel, very good answer.  I've been keeping track of the pressure for a week, now. 
    • Hey Rebel, what do you consider low and high pressure?  Perhaps a stupid question, but I just got a weather station so now I can start tracking barometric pressure. Right now the numbers don't mean much to me, been around 28-29% in the south metro the past few day and I don't know if that's low, high or middle.
    • Low pressure signals a front moving in, (Bad weather, wind may be  from the east or north) which usually puts them "on the feed", can have some hot and fast action. Likewise, a swing in the other direction, a high pressure system , (wind from the west or south) which signals clear skies and sunny weather, may do the same. The key to me, anyway, seems to be hitting it just as either front moves in. An extended low or long high may result in poor fishing. Remember the old adage, which also has to so with the pressure: "Wind from the east; fish bite the least...wind from the north , the fisherman goes not forth, wind from the south, blows the bait in the fish's mouth; wind from the west, is when the fishing is best". 
    • Those trumpers sure know how to keep things classy.
    • Is it true, the lower the pressure, the bite gets hot? Or the higher the barometric pressure the fish slow down on biting? 
    • Is that like saying "the lights are on, but nobodies  home.?
    • Newsie's where reporting on how the lights are on in the white house at 5am...   "First time in a long long time.."    
  • Our Sponsors