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  1. #1
    Join Date
    Jan 2009
    Location
    Shepherdsville,Ky
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    129
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    trolling getting weak?

    I have a pro 4300 MG on a 17.5 ft alum fisher' this should be plenty of motor on this boat on a fairly calm day, it just seem's like it lack's power. How often should you change the brushes in these motor's and will it help the thrust any. On a windy day it has to be in 5 (highest setting) to make any head way. Batteries are good, hold a good charge and last all day. I'm looking at new Minn kota maxium 70 but I've had to dump to $$ in my truck lately and it will be a little while for new a TM.
    Thanks Kydog
    sorry about thread title, should have trolling motor getting weak, can't edit title!

  2. #2
    Join Date
    Dec 1969
    Location
    Edmonson co. Ky.
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    613
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    Re: trolling getting weak?

    Have you checked the cables and the connections? Do the cables heat up while you are trolling? Bad connections can alter the speed that you troll.

    Hope this helps and good luck,

    David

  3. #3
    Join Date
    Mar 2008
    Location
    Lexington
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    372
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    Re: trolling getting weak?

    Batteries could still be weak.. How old are they?
    Even if your trolling motor feels week, it may not be worth the rebuild cost to try to get a couple pounds of thrust out of it.
    I upgraded mine with a used unit last year and then that used unit needed rebuilt. I put all new controls/brushes in the lower section and cleaned it out well. overall. I couldn't tell a whole lot of difference from before it quit.
    I could tell a little bit of difference when I upgraded my batteries.

  4. #4
    Join Date
    Jan 2009
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    Shepherdsville,Ky
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    Re: trolling getting weak?

    one battery is a year old and the other is 2 yrs old, they are kept on a on a onboard charger. Maybe the 43 lbs of thrust are not enough.
    kydog

  5. #5
    Join Date
    Dec 1969
    Location
    Georgetown, KY
    Posts
    526
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    Re: trolling getting weak?

    check to see if some fishing line has gotten around the shaft, it can pick up line even if it is not yours, that would slow it down, and could cut into your seal, I take my prop off every year just check. hope it helps

    Gary

  6. #6
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    Dec 1969
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    Re: trolling getting weak?

    43 lbs of thrust isn't much. my 55mk dosn't pull very well either.

  7. #7
    Join Date
    Jan 2009
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    Shepherdsville,Ky
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    Re: trolling getting weak?

    Quote Originally Posted by kygorski View Post
    43 lbs of thrust isn't much. my 55mk dosn't pull very well either.
    It might be time to upgrade to 24v 70 lber, more power!!!!!!!!!!

  8. #8
    Join Date
    Feb 2010
    Location
    South Eastern Kentucky
    Posts
    32
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    Re: trolling getting weak?

    if it had plenty of power before then it is prob battery or line wrapped up in the prop like stated above.

  9. #9
    Join Date
    Dec 1969
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    Re: trolling getting weak?

    Quote Originally Posted by greenriverman1 View Post
    Have you checked the cables and the connections? Do the cables heat up while you are trolling? Bad connections can alter the speed that you troll.

    Hope this helps and good luck,

    David
    Ditto on the cables and wires. I have helped two buddies with similar problems and we rewired the TM. Upgrading to a larger wire size on older TM's makes a big difference in performance. Also check the wires from the batteries to the TM plug. Go as larger here as well, around a 4-6 guage works best in my experience. Good luck.

    Joe

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