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  1. #1
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    Mounting Ultrex---4 holes or 6 holes in the bow?

    I removed my Terrova and am preparing to mount the Ultrex. I was read the installation manual and it states 6 bolt are prefer on the mount plate but, 4 is ok, just not preferred. I already have 4 holes that exist that luckily match the 4 holes on the old Terrova quick remove plate. I can do 6 but, why do more holes if you don't need to?

    For those that mounted a Fortrexx or Ultrex how many bolts did you do?

    Also, I walleye fish and won't be hitting any stumps or anything anytime soon....not impossible just unlikely.

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  3. Member Syncros's Avatar
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    #2
    I used six because I had 6 drilled from the factory on my Ranger.

    I ran an 80 lbs Fortrex on my previous boat with just 4 holes/bolts and it hit a lot of stumps and rocks and I never had a problem. This was on a Nitro Z7 and the deck where the motor bolts is 1 inch thick (I know I measured). I wedged the motor on something under water so hard I pulled the handle off the gman cable trying to pull it up. I had to use my gas motor to get the boat off. I pulled that Fortrex off when I sold that boat and that area looked the same as when I put it on.


  4. Member
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    #3
    I think the six bolts comes into play more in rough water. That's a heavy motor that takes a lot of pounding and six bolts will spread that shock out more.

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    #4
    Quote Originally Posted by Rip Bass View Post
    I think the six bolts comes into play more in rough water. That's a heavy motor that takes a lot of pounding and six bolts will spread that shock out more.
    this is my thought, my nitro came with 5, haha and the 5th was custom drilled... I put a quick plate on and got 6 bolts in it over screws.

  6. Electrical/Wiring/Trolling Motors Moderator Jonestrollingmotor's Avatar
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    #5
    The 6 bolt mount will give you better support and less stress (doesn't allow the base to twist as much) on the deck of the boat.
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    #6


    A couple of views to help visualize. First pic is new plate beside old plate that is still mounted---2nd pic is the room I have to work with.
    Attached Images Attached Images

  8. Electrical/Wiring/Trolling Motors Moderator Jonestrollingmotor's Avatar
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    #7
    If you don't drill the back holes, you'll have no support for the back part of the mount. You may have to re position the motor.
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  9. Member
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    #8
    If you can get underneath, consider fender washers or a backing plate on the bolts.

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    #9
    Big stainless fender washers are the plan on the 4 existing holes. The other 2 if I decide to drill might be a bit trickier.

  11. Member
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    #10
    Get at least one in the back of the plate. Don't loose sleep over it.

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    #11
    Quote Originally Posted by Fishysam View Post
    Get at least one in the back of the plate. Don't loose sleep over it.
    Agree....probably will be a self tapper too!

  13. Member
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    #12
    I had four and drilled the second two for better support. I can't hurt to overkill.
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    #13
    I have 6 holding the MKA47 to the boat and 6 holding my Terrova to the top mount plate (had to move the Terrova back a bit from what the instructions showed and drill two extra holes. Easy-peasy.
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    #14
    I use six holes on my skeeter zx250. The rear 4 get bolts, washer and lock nut. the two holes up front, one cannot reach them with a wrench. So I use the old MG rubber screw mounts where you drop them in the hole and as you tighten the screw it compresses the rubber. It is solid as a rock.
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  16. Member
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    #15
    Can you buy these? I might need 2

  17. Member
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    #16
    Quote Originally Posted by foo View Post
    Can you buy these? I might need 2
    Yes,John Jones at Jones Trolling motor has them and he is a sponsor on here.

  18. Member
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    #17
    Yes you can buy them. MK 47. That's top and bottom and MK 48 is only the top. Seeing as I have a fortrex and terrova link. Thought I was cool till the ultrex cam along hahaaa