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Minn Kota ultrex #13341950 11/14/19 03:27 PM
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Fat Shaft Offline OP
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Looking to get new trolling motor for 20’ cobra bass boat. Was looking at minn Kota ultrex. Needing help deciding which one to get. 24v or 36v. Have plenty of room for another battery but not sure if I need it or not. Fish tournament monthly so runs 8-9 hrs during the day. Any input is appreciated


Cork and Minnows
Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: Minn Kota ultrex [Re: Fat Shaft] #13341956 11/14/19 03:30 PM
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photofishin Offline
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I have a 20.5 foot bay boat (likely much heavier than your bass boat) and run a 24 volt Motorguide Xi5. It runs all day long. I would think 24 volt would be just fine. If you want to spend the extra money on batteries and trolling motor, go for it...however the few hundred you may save buys a lot of lures!

Last edited by photofishin; 11/14/19 03:31 PM.
Re: Minn Kota ultrex [Re: Fat Shaft] #13341976 11/14/19 03:51 PM
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Jeff From Iowa Offline
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36v for sure, if your on any new boat pages its common to see guys who bought boats with a 80 on post when they go 36 how much better it is, battery life is way extended etc.

Im on a phoenix page and they sell 721 919 etc with 80 at some dealerships to drop the sticker cost and guys very often end up changing it out.

Re: Minn Kota ultrex [Re: Fat Shaft] #13342009 11/14/19 04:12 PM
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EastTexasBassin Offline
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If you have room for a 3rd battery, go for the 36v. Better to have the extra power and run time when you need it.

Re: Minn Kota ultrex [Re: Fat Shaft] #13342020 11/14/19 04:22 PM
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reeltexan Offline
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rule of thumb - always get more trolling motor than you think you need.


"..The pleasantist angling is to see the fish
Cut with her golden oars the silver stream,
And greedily devour the treacherous bait.
Bill Shakespeare





Re: Minn Kota ultrex [Re: reeltexan] #13342033 11/14/19 04:33 PM
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Wayne P. Offline
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Originally Posted by reeltexan


rule of thumb - always get more trolling motor than you think you need.



Second rule of thumb-----no such thing as too much trolling motor power.


Helix 12 CHIRP MEGA SI+ GPS G3N and G4N, 1198c SI, SOLIX 10 SI G3,
Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI and G3, MEGA 360, RC-1
Re: Minn Kota ultrex [Re: Fat Shaft] #13342040 11/14/19 04:38 PM
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reeltexan Offline
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word ^


"..The pleasantist angling is to see the fish
Cut with her golden oars the silver stream,
And greedily devour the treacherous bait.
Bill Shakespeare





Re: Minn Kota ultrex [Re: reeltexan] #13342066 11/14/19 04:59 PM
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Fat Shaft Offline OP
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Well looks like I’ll get a 36 volt. Appreciate it. Know I just hope it helps catch more fish.


Cork and Minnows
Re: Minn Kota ultrex [Re: Fat Shaft] #13342178 11/14/19 06:06 PM
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Jeff From Iowa Offline
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Originally Posted by Fat Shaft
Well looks like I’ll get a 36 volt. Appreciate it. Know I just hope it helps catch more fish.



You might consider buying 3 new batteries, adding one new one to a bank it will get drawn down to the performance of your old ones best case scenario.


lithium are getting cheaper every day. I am running 50ah relions for my tm and they have never failed for me. the lowest Ive ever seen on them after 9 hours in wind on the tm is 39.2,,, yes that is over 36. I run my tm on lithiums at 1-1.5 speed, when I had group 31 agm I would start the day at 2-3 speed and by end of the day I was on 6-7 speed to make my boat move.

I paid 575 ea for my 50ah relions but there are some now out there as low as 360 I think each. They weigh 15 lbs, charge faster, put out a consistent power level and last 10-20 years vs every 3-4 years needing replaced.

Re: Minn Kota ultrex [Re: Fat Shaft] #13342182 11/14/19 06:08 PM
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Jeff From Iowa Offline
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This stuff is getting cooler and cooler here is one I just found on ebay with a quick search.. built in gauge and usb.. crazy stuff.


https://www.ebay.com/itm/LIFEPO4-12V-50AH-LITHIUM-PHOSPHATE-LFP-DEEP-CYCLE-BATTERY-Lead-AGM-Replacement/163815117924?hash=item2624245464:g:c20AAOSwnLFdUVmu

Re: Minn Kota ultrex [Re: Fat Shaft] #13342297 11/14/19 07:40 PM
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SteezMacQueen Offline
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Get the 36v. I have a 24v with two Optima Grp 31’s. It’s hammered by the end of 6-8 hours. A few times the batteries have discharged so deep, that the foot pedal wouldn’t even turn.

....this is on a 19ft class boat.


Eat. Sleep. Fish.
Re: Minn Kota ultrex [Re: Fat Shaft] #13342547 11/15/19 12:07 AM
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Capshaw42 Offline
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I agree I bought my 210 super pro procraft with a 24v 80lb. I want to trade it in so badly for 36v I feel like it’s really sluggish under 7 power and barely last 8 hours.


Brady Capshaw

2018 Z-21 250 Pro XS
Burleson. TX
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