12V - 55# - Group 31DC - Approx. Run Time on 16' Alumacraft

Tin Man

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Considering a bow mount trolling motor. Motorguide 12V with 55# thrust. Largest 12V battery is a group 31DC. Want to keep it simple and keep weight down, so I'd like to keep it 12V.

My boat is an Alumacraft V16. Usually fish 2-3 adults.

I know there are many variables (weight, wind, current, etc), but what is the approximate expected run time?

Thanks
 

MrGiggles

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12v motors draw roughly 1 amp per pound of thrust running wide open. Given a 50 amp draw, that battery is likely around 100ah, which gives you less than two hours at 100%.

If that's a digital motor, they're pretty efficient so it's fairly accurate to just double that number for a calculation at 50% speed.

The only situation where you might find an upgrade worthwhile is if you like to troll at moderate speeds (1.5-3mph) for long periods of time. That takes a lot of battery capacity. Most guys with smaller boats like that just use a single large battery and get along fine.
 

Tin Man

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I troll at 2mph regularly (once I find the fish!).
I'll look into the digital versions.
If I could get 4 hours that would be great!
 

thill

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I have that setup, (55# digital Terrova on a V16') and I easily run all day while fishing with a group 29 battery, but it's not a lot of 100%. Pretty constant 30-40% pushing me along the shoreline or holding in the wind, with bursts of 100 to get me to the next area.
My Motorguide wasn't as efficient as the Minn Kota, but I think it lasted all day too, before it burned up.
 

airshot

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I have a 16' Sylvan SC boat with a MinnKota 55 lb thrust and run it on two group 31 deep cycle batteries wired for 12 volts. Under ideal conditions I can get about 8 hrs trolling time. Havent had the chance to run it in wind and heavy seas yet, so you can make your own caculations from that. My boat is fairly heavy as their is another group 31 house battery and a group 24 starting battery, aling with a builtin 15 gallon fuel tank.
 

Tin Man

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Thanks for the real world data. I'm looking at the Minn Kota Terrova #1358805 and the Motorguide Xi3 #940700020. They are as close as comparable as I could find.

55# Thrust
54" Shaft length
12V
Handheld remote
No sounder (I don't want one)

Leaning towards MG as it can connect through a Gateway and NMEA network to my Lowrance Elite Ti2. When connected, TM controls can also be performed via FF screen.

Just not sure how much I would use this feature, as my boat is tillered steered and my FF console (see attached pic) is on the port side of where I sit. I have used a remote feature before and it was plenty good.

Any pros/cons between these two TMs? Parts, reliability, durability, etc,?

Thanks

IMG_4406.jpg
 

airshot

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Always been a fan of MinnKota, owned them for decades, never an issue. My current motor is the V2, 55# thrust and 55" shaft. The remote is awesome!! Also anchor lock, will never use an anchor again, so much easier! Keeps your boat headed into the wind within a three foot circle. When using the anchor feature, the motor runs constant in two foot waves, speed varies to keep position, after 4 hrs My batteties show a 20-25% loss in charge.
 

FuzzyGrub

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I can only say that we have been very happy with the MG Xi3. I'm sure the MK is good, as well. I see you are getting the GPS capabilities. Highly recommended. On a recent solo trip (first one), it made life very easy. Point it in the direction I want to go, and hit the button. Can change speed up/down while under way. Anchor lock on hook up, to fight/land fish, or hold position in wind/current. I've said it before, "I will not buy another bow trolling motor without GPS". With the remote and lanyard, doubt that you would use NMEA network to control it. My guess is that there is probably some delay introduced too.
 

Tin Man

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I agree...probably would not use the NMEA features with a remote.
I'll probably be going with the MK, as that was the only reason for considering the MG.
 

airshot

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What ever motor you choose, if you do a lot of trolling or use the anchor lock feature consider two batteries for the trolling motor. Your batteries will last longer if you dont drain them below 50%..... Been perch fishing this fall and useing the anchor lock feature. It has been windy, avg waves of 2 feet or more with winds around 20 mph. The trollibg motor has been working hard to hold position, sometimes running 60-80% full to maintain position. The remote shows me how much throttle the motor is using to hold position. On some ocassions it was running at 10 which is wide open...still used under 35% of total battery charge after 4 hrs of running...
 

FuzzyGrub

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What ever motor you choose, if you do a lot of trolling or use the anchor lock feature consider two batteries for the trolling motor. Your batteries will last longer if you dont drain them below 50%..... Been perch fishing this fall and useing the anchor lock feature. It has been windy, avg waves of 2 feet or more with winds around 20 mph. The trollibg motor has been working hard to hold position, sometimes running 60-80% full to maintain position. The remote shows me how much throttle the motor is using to hold position. On some ocassions it was running at 10 which is wide open...still used under 35% of total battery charge after 4 hrs of running...

That's quite the testimony of how well they work. 20mph winds with our light tinny hulls, + 2' waves, WOW!
 

airshot

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That's quite the testimony of how well they work. 20mph winds with our light tinny hulls, + 2' waves, WOW!
Yes, I am very impressed, never had all these bells and whistles in the past, so after buying this boat, this summer has been an eye opening experience. Not only the trolling motor with anchor lock, but also have a newer sonar unit with far more features than ever before !! Have had a lot to learn to bring myself into a more high tech era, and still learning, but these fancy new to me toys are making it fun once again. The biggest improvement for me is how much less work the new electronics have been. Being 72 yrs old and having bad shoulders and other old man issues, not having to deploy and drag in an anchor has been hugh !! In the past, I have often not moved from my position just due to the hassle of retrieving the anchor. Now..simply shut off the troller, push a lever and lift it onto the cradle, move to a new position, flip a lever and drop the troller and hit the anchor lock button...now fish !! If only moving a short distance, just push a button to energize the troller and move where I want to go, without getting out of my seat !! The previous owner told me how much run time he was getting from the dual group 31 batteries, and thought it might be a bit of a stretch, but he was pretty accurate, happy to say. The fancy sonar unit allows mevto return to the exact spot I used in previous outings..and has cool settings like down scan which creates an almost a picture accuracy of what is down there. If I had to go out and actually purchase all these new toys, it probably would have never happened as it actually has not put more fish in my cooler....but has certainly made finding them more fun with less time fishing empty places. Unfortunately winter has arrived, now just day dreaming about what next season might bring !!!
 

FuzzyGrub

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I was going back and forth on spending the extra $500 for the GPS option. Very glad I went that way.
 

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