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Discussion Starter #1 (Edited)
If I try to use my trolling motor on high for a long period of time (get across one end of lake austin to the other), the breaker trips.

What all do I need to check to see why this happens?


It doesn't do this immediately, and if I stay on the setting just before max (number 4), it doesn't do it at all.

Ultimately, I want to fix this.

I've got a 54lb Motorguide that is 12 volt.
 

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Motorguide operators manual should have proper wire size and breaker rating.

Make sure all conductor terminations are clean and well-made. Replacing the breaker is the low-hanging fruit on this deal.
 

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If this just started the wiring is likely problem, but after tripping numerous times it will weaken the breaker. No guaranty it is in the wiring, but it is the first place I would look. I put silicone grease on all my wiring connection to inhibit corrosion. A loose connection could also be the culprit. Though I would remove the prop to check for anything that could be wound around the shaft.
 

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Same thing happened to me several yrs ago with my 43 lb thrust MotorGuide TM, and the guy in RR that repairs TMs told me a TM is not supposed to be run on speed 5 except for a quick retreat from away from a dock or some reeds. He said the highest speed will overheat the TM quickly. I never use it on 5 anymore and have had no further problems.
 

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How is the ckt breaker connected? Does it use slip on connectors? If so make sure that they are on very tight and a good connection. If one of them is only slightly loose then it will get very hot, that heat will transfer to the breaker and ultimately cause it to open.

I run my 54lb motorguide on max a lot. Then it is 24v so the amps are 1/2 that of a 12v. I soldered the connections to the breaker to make sure of a good connection.
 

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Same thing happened to me several yrs ago with my 43 lb thrust MotorGuide TM, and the guy in RR that repairs TMs told me a TM is not supposed to be run on speed 5 except for a quick retreat from away from a dock or some reeds. He said the highest speed will overheat the TM quickly. I never use it on 5 anymore and have had no further problems.
who ever told you that you can't run your troll motor on HI / 10 / 5 (or even 11) for extended lengths of time, would be the LAST person i'd have fixing my stuff
If the manufactures didn't want you to run them on HI/10/5 then they'd only have Med./9/and 4 on the dial
maybe the next time you see your repair man, ask him/her if they are willing to share whatever it is that they are smoking ?

to answer your question; I think you have a bad connection OR the wires running from front to back are undersized
 

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who ever told you that you can't run your troll motor on HI / 10 / 5 (or even 11) for extended lengths of time, would be the LAST person i'd have fixing my stuff
If the manufactures didn't want you to run them on HI/10/5 then they'd only have Med./9/and 4 on the dial
maybe the next time you see your repair man, ask him/her if they are willing to share whatever it is that they are smoking ?

to answer your question; I think you have a bad connection OR the wires running from front to back are undersized
I'm pretty sure Jackie aka Fishfinder's does not smoke and would be correct about the 12v 43 pound t/m not liking to run full speed. The 43 lb Motor Guide will trip the breakers if run for extended periods on full speed. If into a head wind it is even worse.
 

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manufacturer's do state that you should NOT run the TM at full speed for extended periods of time. just like viagra warns a 4 hour erection is a bad thing. just cuz you can, doesn't mean you should, regardless of what you are smoking.
 

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Sounds like bad/dirty connection but could also be a breaker going out as someone already mentioned. Use a small wire brush and clean connections at the battery. Pull the main plug apart and inspect connections/clean them there. Inspect/clean connections on backside (Female end) of main wiring connection. If it still does it replace the breakers.
 
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