1972 Keel Up Restoration

Discussion in 'Restoration Projects & Questions' started by tj309, Sep 4, 2013.

  1. dynegreg1

    dynegreg1 King Dyner

    Joined:
    May 31, 2006
    Messages:
    587
    Location:
    Pingree Grove, IL
    Boat Model and Year:
    1990 Hydrodyne 20 Open Bow
    Ski Team:
    Skimmer/Aquanut alum
    When I built the boat I measured the clearance of the motors in a twin application. Originally I was thinking to twin rig the boat. The clearance was not an issue, so if you decide to go with that style pylon it should work just fine for twins.

    As far as obtaining a pylon like the 1st one you should be able to purchase one from Pete Pfankuch from Dyna- Ski. It should just be a standard 3" aluminum pylon that they currently use on their boats. His are nice because they are all brightly polished.

    Greg
     
  2. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    I would take either if I could find one. I have searched to no avail.
     
  3. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    Greg - where did you get that pylon? I would be happy with either pylon and think I have a line on my 1st pic's option.

    Jim - load paths for the pylon that Greg put on Bob's boat would not be an issue as I have 1" Coosa splashwell sides that double as 2 of the 5 knees and will carry loads from the rear of the deck If I mount pylon supports there.

    I have to think ahead as the floor will go in soon and I will need plywood under the Coosa floor to bolt the ski pole to. The stringers will have to be notched to accomodate the plywood underside of the Coosa floor.
     
  4. jim

    jim Hydrodyne 18 Specialist

    Joined:
    Jun 14, 2006
    Messages:
    2,321
    Location:
    FL
    Boat Model and Year:
    77 Dyne 18 I/O converted to Outboard
  5. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    Greg - the issue I have with your style of pylon is that I widened the motorwell to 58". The 2 leg mounts would have to be a minimum of 60" apart at the base - inside dimension. The way the legs flare out would insure twin clearance.
     
  6. RiverRat

    RiverRat Hydrodyne 18 Specialist

    Joined:
    Sep 30, 2006
    Messages:
    508
    Location:
    Shoreview, MN
    Boat Model and Year:
    1971 Baby Dyne
    Ski Team:
    Twin Cities River Rats
    Yes, the first pictured pylon is on my boat. It was purchased from Tom Miller (Fiberglass Products and Boat Repair) around 2007. It is basically the same as the ones used on current Dyna-ski boats as well, so either one should be able to get you something. If not, maybe check with KW Show ski equipment. If google does not help on contact info, try going through Lake Elmo Sports to get a hold of KW. Either way, you should be able to tell them how tall you want your pylon to get appropriate clearance over your motors/rope guard. If you need a rope guard, again, check with KW.
     
  7. dynebob1

    dynebob1 Boat of the Month

    Joined:
    Jun 22, 2006
    Messages:
    557
    Location:
    Glen Ellyn, Illinois
    Boat Model and Year:
    1998 18 OB RUA- 250XS.and 1997 Twin Rig /225 optis
    See Jim's post of today to see another picture of a pylon installation.
     
  8. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    Saw that and definitely do not want to go that route as that installation eats alot of cockpit space. Good point about the shipping too - My original option1/1st pic is looking more attractive. I e-mailed Dyna-ski and they will give me any length I want for $500.
     
  9. jim

    jim Hydrodyne 18 Specialist

    Joined:
    Jun 14, 2006
    Messages:
    2,321
    Location:
    FL
    Boat Model and Year:
    77 Dyne 18 I/O converted to Outboard
    Sounds like a plan.
     
  10. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    Spent Christmass at the cabin/workshop and got some stuff done. I laminated 3 1/2" coosa sheets together and made 2 side stringers. I found that cutting the pieces a bit larger than needed, guing them together, and then fine-tuning the size on a large stationary tool such as a table saw or band saw works much better than trying to save a bit of stock by making each lanimation the exact size and then gluing like I did for the center rear stringer. You can never get it exact. Once the assembies dried it was multiple trips into and out of the boat to fit them into the hull. Stringer5.jpg Stringer6.jpg In the 2 pics the starboard stringer has not been cut to size on the top. You can also see on the rear center stringer that the laninations did not exactly line up which is why I decided to cut/glue/cut to final size. After I cut the starboard stringer to final size I tacked it in (like all the others) with Bondo Glass. I also used Bondo Glass for gluing laminations together. The stuff dries in 10-20 min and does not put out near the fumes resin does which kept my wife and a cabin full of company happy.

    To extend the outer 2 stringers forward I cut and fitted each piece individually and tacked it in. This was much easier as I could do this without getting into the boat. Stringer8.jpg Stringer9.jpg Stringer10.jpg Stringer7.jpg

    Sorry the pics are not in the order I uploaded them - sometimes computers outsmart themselves. As you can see there is alot of dust in the hull which came from cutting Coosa board. That stuff makes a mess. Before each tacking session I wiped down the area of interest with acetone. To finish this work I cut a bunch of 1/2" 45 degree beveled strips and tacked them in along all edges to make tabbing easier - which is up next.
     

Share This Page