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Jan 23rd, 2013
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How to measure/know the right shaft length for a trolling motor? #12753021
05/12/18 11:57 PM
05/12/18 11:57 PM
Joined: Jan 2008
Posts: 578
San Antonio, Texas
S
SATopWater Offline OP
Pro Angler
SATopWater  Offline OP
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Joined: Jan 2008
Posts: 578
San Antonio, Texas
So I'm considering buying a new trolling motor. In order to measure the current one for size, where do you measure from?

Top of head to bottom of motor?

Middle of head to middle of motor?

Bottom of head to top of motor?

Or, some other spots I'm not thinking of?

Re: How to measure/know the right shaft length for a trolling motor? [Re: SATopWater] #12753050
05/13/18 12:33 AM
05/13/18 12:33 AM
Joined: Feb 2013
Posts: 3,293
springtown,tx.
J
jbobo Offline
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jbobo  Offline
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Posts: 3,293
springtown,tx.
Mainly you want to be able to have the motor at least 1.5 ft in the water. If you fish big lakes with big winds consider adding another foot or so.


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Re: How to measure/know the right shaft length for a trolling motor? [Re: SATopWater] #12753100
05/13/18 01:44 AM
05/13/18 01:44 AM
Joined: May 2014
Posts: 4,498
texas
GIG'EM AGGIES Online content
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GIG'EM AGGIES  Online Content
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Joined: May 2014
Posts: 4,498
texas
They go by the length of the shaft and are usually 45, 52 or 60". So measure the length of the shaft excluding the head and motor. thumb


I am a Senager. (Senior teenager) I have everything that I wanted as a teenager, only 50 years later. I don't have to go to school or work. I get an allowance every month. I don't have a curfew, I have a drivers license,a PU truck and I have a bass boat.


illegitimi non carborundum
Re: How to measure/know the right shaft length for a trolling motor? [Re: SATopWater] #12753297
05/13/18 10:39 AM
05/13/18 10:39 AM
Joined: Jul 2009
Posts: 449
Austin
S
Skunked Again Fishing Offline
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Skunked Again Fishing  Offline
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Joined: Jul 2009
Posts: 449
Austin
Measure from 2 feet below the waterline to the bow surface, the add another foot or so. Then take the next size up. Longer is better, as long as the overhang still fits within the boat. Having a longer shaft than needed allows you to have flexibility, especially in rough waters.

I called the mfg of my boat and asked them.


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Re: How to measure/know the right shaft length for a trolling motor? [Re: SATopWater] #12753403
05/13/18 01:42 PM
05/13/18 01:42 PM
Joined: Oct 2006
Posts: 10,267
Trophy Club, TX
Ken A. Online content
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Ken A.  Online Content
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Posts: 10,267
Trophy Club, TX
If you are considering an Ultrex or any other TM that has Spot Lock, you may want to think about this.

In my buddies boat with Ultrex, some times he sets the spot lock, the nose naturally turns into the wind. We both stand on the back deck throwing at the target. That lifts the nose quite a bit. So consider that.

Last edited by Ken A.; 05/13/18 01:43 PM.
Re: How to measure/know the right shaft length for a trolling motor? [Re: SATopWater] #12753789
05/13/18 09:49 PM
05/13/18 09:49 PM
Joined: Jan 2008
Posts: 578
San Antonio, Texas
S
SATopWater Offline OP
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SATopWater  Offline OP
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San Antonio, Texas
Thanks Guys. Very helpful.

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