Went out yesterday with my new (used) boat for the 2nd time. This time I used 24v switch on the foot pedal and when using speed 4 or 5 the 2nd breaker trips.. I can switch it over to 12v and it works. I have to hit the reset and then 24v will work again..

It's a motor guide 40 series 50lb thrust motor with two 29 series batteries.

What should I look for to fix this issue.

(Corroded wires/two small gauge wires etc.)

Any help would be appreciated..

Is that a 12 volt trolling motor?  How are the two trolling motor batteries connected to each other? Why are there 2 breakers?

How is it all connected starting from the trolling motor?

24v trolling motor.. 4 prong plug for the motor with two sets of wires goes back to the breakers near the console then to the batteries. I think they are wired independently. Meaning one set of wires to the breaker then to the battery.. I have not checked for corrosion on the breakers but have on the plug and the batterys they should be ok.. I'm going to pull the panel for the breakers today and check for corrosion..

The reason I ask Is that I have never seen a 50 pound trolling motor that is 24 volt, usually they are 12.

Anywho, Take a look at this PDF and see if your batteries are connected correctly: http://sites.mercurymarine.com/pls/portal/docs/PAGE/MOTORGUIDE/MOTORGUIDE%20SUPPORT/ONLINE_MANUALS/MANUAL_CONTENT/MM6900%20-%202004%20-%20OWNER'S%20MANUAL_0.PDF

Good luck man.

That link got chopped can you redo it..

Never mind i think i found it on the site..

I think the issue may be how I have it wired. they are wired independently but the guide shows it to use a jumper.. I'll have to see someone's setup to see how theirs is..

I have a straight 24v.

Red to positive of one battery

black to negative of other battery

Jumper cable to positive on one to the negative on the other.

when they are wired this way you must disconnect the jumper cable and charge the batterys seperately.

I think i'm going to switch it to straight 24v.. I have a 2 bank charger would I still have to unplug the jumper to charge..

The second breaker may need replacing.  As breakers age it seems to make their trip point get lower - perhaps this is a design safety-guard?  In particular, breakers are generally not intended to be used as on/off switches and just the mechanical switching seems to lower the trip point.

Check that it is a 50 amp breaker - it may be rated too low.

You don't have to disconnect the series connection for a multi-output charger.

There are 2 breakers one for each battery.. I will check when i get home what they are rated for.

Ok So I went out and got a 50amp breaker and rewired the trolling motor for 24v only cleaned up all the contacts..

Also made a jumper for my battery charger.. Took her out today and worked like a champ even on Number 5 speed.. so 24v series was the way to go..