24V vs 12V Trolling Motor Setup / Weight Distribution

Grizz1288

Cadet
Joined
Jul 31, 2011
Messages
29
Good morning, I am installing a new (to me) trolling motor on my 18'8 Flats and Bay and I am contemplating my weight distribution options and was wondering if anyone has gotten into this debate before and what they ended up doing.

Situation: I previously had a 12V minn-kota (I forget the model - black and yellow freshwater 50-ish lbs thrust) trolling motor mounted on the bow, it was what the previous owner had mounted so I used it until the mounting bracket and spiral cord fell apart and then removed it. I acquired a new-ish minn-kota Riptide RT70 24V motor from a family member that it wasn't work out for and I just got it mounted up on the bow yesterday. Now I am running though my battery size/storage/placement options.

1) Am I headed in the completely wrong direction even using the 24-V system on this vessel? I am sure that a RT55-12V would push this boat just fine, but that's not what I have and I dont want to drop $1K on a smaller version just to avoid the extra battery unless its necessary.

2) Looking at 2x 12V (27M - Lead Acid ) batteries are 57 lbs a piece, thats 114 lbs PLUS about another 50-lbs for the actual motor itself. This seems like a lot of weight to throw right up near the bow of the boat. The previous battery location was in the front most hatch. I do have the room for 2 batteries up there but I worry its too much weight. I have the option of putting them in the second hatch in the front, which is closer to the middle of the boat. Please see pictures for locations.

Has anyone installed a 24-V system on a flats boat of this size with the batteries up front and had issues with the weight distribution? Where did you mount your batteries?

Sitting on the back is a Johnson 115 2-Stroke, pretty lightweight motor, hull is designed for up to a 150.

Thanks for any input as always.
 

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TyeeMan

Master Chief Petty Officer
Joined
Feb 27, 2006
Messages
849
So basically you have a person sitting up there. Grab on of your buds, launch your boat and have your bud sit up front and see how it looks. I'm thinking you will be just fine.
I over analysed this same thing on a previous boat, , it was a deep V 18 foot. Turned out to be no big deal.

That out board will counterbalance that and if you have a belly tank, it probably sits in the mid to back of the boat.

Even if you don't need all the power of the 24v system, you'll be able to troll for ever on one charge.
 
Joined
Mar 1, 2005
Messages
956
+1 on not overthinking it.

I've got a 90hp 4-stroke with a 12v trolling motor and two batteries running in parallel for double the battery life.

If I understand this right, you previously had a bow-mounted trolling motor and a battery up in the bow. With the new setup, you will still have a trolling motor and battery in the bow but are now going to add another 50lb battery. That's like adding a 7yr old girl. A 115hp motor wouldn't even notice.
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,687
Why not just run it off 12v? You said you didn't need the power. I just bought a boat with a Motorguide 24v, high thrust ™. I didn't want the jerking around of the high thrust and didn't need it for the way I fish. The batteries were mounted, in the 17' Bass Boat between the front seat and the bow. I didn't want that weight up there either.

It was a dual console and there was room under the passenger console so I moved the TMs there and wired them in parallel giving me the same amp-hour capacity with only 12v and somewhere around half the thrust per speed setting. If you don't want-need the capacity of the second battery, chunk it and just run off a single.
 

Starcraft5834

Lieutenant Commander
Joined
Jun 2, 2013
Messages
1,677
my 2 c.. spend more $ 1x. and buy a gas 4 stroke.. say a 2.5hp. they usually have the gas tank on top of the motor (mine does).. i first bought an electric trolling motor 55lb trust for an 8 foot bass buggie.. it worked fine for about 5 mins.. then the battery (which by the way weighs more than the gas outboard I now have) started crapping out.. I got rid of the tiny boat, returned the trolling motor and put the 2.5 on my new 20ft toon as a kicker next to the 115 big boy.. it pushes me along at 4mph.. will outperform an electric by a lot............... just saying consider it..
 
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