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Thread: What to use?

  1. #1
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    Default What to use?

    I?m running a 3/16 flex cable just wondering what is the best thing to use between drive dog and strut gap??

  2. #2
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    Normally just a gap between drive dog and strut...no washer or bushing.... Cable shrinks a bit when under load, You don't want the drive dog hitting the strut at all.....

  3. #3
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    https://www.offshoreelectrics.com/pr...s%2810+pack%29
    Put 2 washers on and a bit of grease and the drive dog will never hit the strut.
    Mic

    Mic Halbrehder
    IMPBA 8656
    NAMBA 1414

  4. #4
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    I prefer to just run with an appropriate sized gap, and no washers.

  5. #5
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    The gap for a collet set-up should be set based on the length of cable. For short cable lengths, smaller gaps around 1/8" are OK. Longer cables should have a larger gap, start with 3/16".
    Look for signs of contact between the end of the strut and drive dog and adjust as needed. Ideally, you do not want too much gap.
    Tyler Garrard
    NAMBA 639/IMPBA 20525
    T-Hydro @ 142.94mph former WR

  6. #6
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    Thanks guys for feedback I also noticed it takes in a bit of water between gap and runs up the back of strut through the stuffing tube and in the boat any ideas how to stop it

  7. #7
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    Quote Originally Posted by RaceMechaniX View Post
    The gap for a collet set-up should be set based on the length of cable. For short cable lengths, smaller gaps around 1/8" are OK. Longer cables should have a larger gap, start with 3/16".
    Look for signs of contact between the end of the strut and drive dog and adjust as needed. Ideally, you do not want too much gap.
    Than you for confirming something I have pondered for years!
    Nortavlag Bulc

  8. #8
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    A piece of silicone water tubing or heat shrink tubing over the stuffing tube on the inside of the boat so it lightly touches the flex or wire, will stop most of the water coming up the shaft.
    Paul "tug Killer" Upton-Taylor, Cat lover.
    FastElectricBoats.co.uk

  9. #9
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    marine grease on the cable

  10. #10
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    Quote Originally Posted by tales View Post
    marine grease on the cable
    Marine grease works really good for me sporting around on the water.

  11. #11
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    Beveling the front edge of the drive dog also reduces the water being forced up into the stuffing tube.

    The bottom one is beveled. The top one is not.

    005.jpg

  12. #12
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    Cool

    Because the cable will shorten differently in each application due to length, stiffness, clearance in the stuffing tube, and load it is not possible to determine a perfect gap. Using washers between the strut and drive dog with no gap means that the cable will be in tension, causing excess drag and stress on the cable. As Tyler mentions above, a minimal gap is best, but you must not have the drive dog touching the strut.

    I seldom have used one, but as mentioned a short piece of silicon fuel tubing on the inboard end of the stuffing tube can virtually eliminate water intrusion from the drive line, see below.



    bd4r5we4.jpg
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  13. #13
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    Quote Originally Posted by 785boats View Post
    Beveling the front edge of the drive dog also reduces the water being forced up into the stuffing tube.

    The bottom one is beveled. The top one is not.

    005.jpg
    Well I just learned a good tip - Thanks

    Dogz 20191227_122226_resized.jpg

    In exchange , here's another method which works well to keep water from entering the joint between the stuffing tube and strut - cover the joint with siliconed-inside shrink ; has substantially cured water intrusion for me :

    Strut shrink 2.jpg

    Here I had to notch the strut to allow the shrink to slip on :

    Strut shrink 20191227_123802_resized.jpg
    2008 NAMBA P-Mono & P-Offshore Nat'l 2-Lap Record Holder; '15 P-Cat, P-Ltd Cat 2-Lap
    2009/2010 NAMBA P-Sport Hydro Nat'l 2-Lap Record Holder, '13 SCSTA P-Ltd Cat High Points
    '11 NAMBA [P-Ltd] : Mono, Offshore, OPC, Sport Hydro; '06 LSO, '12,'13,'14 P Ltd Cat /Mono

  14. #14
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    I had a similar problem with one of my Pursuits with water entering the stuffing tube. All I had to do to solve the problem was change my method of greasing. After greasing the flex shaft I would put a couple pumps of grease from the gun in the stern end of the stuffing tube before inserting the shaft. Never had a problem after using that method. You do have to make sure to clean the end of the shaft of any grease before inserting it into the collet.

  15. #15
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    As Paul has shown the bevel on the front of the dog helps prevent water being forced into the strut/stuffing tube. I have also been using this method for a long time now along with other usual mods to prevent water coming up the stuffing tube into the boat.

  16. #16
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    Quote Originally Posted by properchopper View Post
    Well I just learned a good tip - Thanks

    Dogz 20191227_122226_resized.jpg

    In exchange , here's another method which works well to keep water from entering the joint between the stuffing tube and strut - cover the joint with siliconed-inside shrink ; has substantially cured water intrusion for me :

    Strut shrink 2.jpg

    Here I had to notch the strut to allow the shrink to slip on :

    Strut shrink 20191227_123802_resized.jpg
    Ditto Tony, can?t believe I didn?t think of it or discover it on here before.
    And BTW, interesting rudder in the last pic you posted

  17. #17
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    Quote Originally Posted by srislash View Post
    Ditto Tony, can?t believe I didn?t think of it or discover it on here before.
    And BTW, interesting rudder in the last pic you posted




    2008 NAMBA P-Mono & P-Offshore Nat'l 2-Lap Record Holder; '15 P-Cat, P-Ltd Cat 2-Lap
    2009/2010 NAMBA P-Sport Hydro Nat'l 2-Lap Record Holder, '13 SCSTA P-Ltd Cat High Points
    '11 NAMBA [P-Ltd] : Mono, Offshore, OPC, Sport Hydro; '06 LSO, '12,'13,'14 P Ltd Cat /Mono

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