Hoist / lift bunk setup for 2014+ Prostar

skimtbskimtb Posts: 159 Baller
edited May 1 in Boat Talk
What is everyone doing? Typically you match the trailer, but not so easy with a two bunk lift...

The lip on the bottom of the hull has me a bit nervous to mount to much pressure on it.

Going outside of the lip seems too wide and not as stable?

I’m debating adding 2x6 to top of bunks with big gap for the lip on bottom of hull. Overkill?
elr

Comments

  • skihackerskihacker Posts: 267 Baller
    I'm having the exact same issue, I've spoken to 2 dealers who recomend the bunks sit on the flat runs which is going to be nearly impossible.
  • MichaelWiebeMichaelWiebe Posts: 21 Baller
    I have mine on the outer flat runs, as recommended by the dealer. It works fine.
    The picture shows before, and the red line is the after.
  • ZmanZman Posts: 1,325 Crazy Baller
    @MichaelWiebe Is that a Craftlander lift?
    @skimtb On my Malibu Response Txi, I have the two lift bunks just inside the chines. Very stable, works fine.
  • HortonHorton Posts: 26,537 Administrator
    @skimtb I pull my boat up until just before the bunk touches that convex contour in the bottom of the boat. The first time I did it I thought the boat was too far back on the bunks but 2 years later it has not been an issue.

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  • skimtbskimtb Posts: 159 Baller
    @MichaelWiebe Thanks - that is a good data point. Likely what I’ll do first, just a bit nervous to have them so wide i guess, especially in the front.
    @Zman The prostar has a weird bottom, hard to see in pics.
    @Horton My lift is a freestanding type and I’m not sure about having the boat that far “back” on it vs sharing load front to back. The bunks are 12’ long, so it would be way back.... how long are your bunks?
  • skihackerskihacker Posts: 267 Baller
    With a free standing cantilever I too worry that that far back may be an issue. I also don't think i can get my bunks high enough in the front to keep the center v clear of the front rail of the cradle, that would also rob me of quite a bit of needed space in the fall during lower water levels. I've got ideas but there's sure to be some fiddling over the next couple weeks.
  • MichaelWiebeMichaelWiebe Posts: 21 Baller
    @Zman Yes, it's a Craftlander lift. It has worked very well for us. First for a Wakesetter, and now the ProStar.
  • 3mustskiteer3mustskiteer Posts: 5 Baller
    @MichaelWiebe do you have any specific measurements on width @ the front bunks & the rear bunks? Also height of bunks off of the cradle?
  • MichaelWiebeMichaelWiebe Posts: 21 Baller
    I'm traveling for two weeks currently. I'll measure it when I get back. The width is matched to the outer flat runs. It's a little narrower in the front. The height is the same for both front and rear.
    The boat is lower to the cradle now, so there is no "fail safe" for the fins or propeller not hitting the cradle. Not hitting relies on proper operation, by ensuring the cradle is low enough for entry and exit. And the correct boat position when lifting.
  • MichaelWiebeMichaelWiebe Posts: 21 Baller
    @3mustskiteer @skimtb As requested, I found a pic of what it looks like. Sorry about the snow! :'(
    RAWSki
  • 3mustskiteer3mustskiteer Posts: 5 Baller
    In Horton's latest video (standing in front of prostar) his bunks are set narrow @ the bow, @horton, what is your width in the rear?
  • skimtbskimtb Posts: 159 Baller
    I’ve not put boat on yet, but after a lot of measuring, I’m going @MichaelWiebe style and have the bunks set at 60” in back and 54” in front. The front is 2-3” higher than the rear (will depend on your bunk supports)
    The 60” rear matches the rear outer trailer bunks.
    I think There is another solution to double up the bunks at 34”, and have a “gap” on the top bunk approx 28” long for the funny lip on the bottom of the hull. This would clearly be more work....
  • Dacon62Dacon62 Posts: 616 Crazy Baller
    Might be missing something here but couldn’t you just add a build up of 1/4”- 3/8” to the bunk in front of the rear bump down of the hull, or whatever the correct difference in height needs to be?
    That way the hull is supported just like the trailer. Just have to make sure to have a stop or make a mark somewhere to make sure it sits at the right spot front to back on the bunks.
  • skimtbskimtb Posts: 159 Baller
    @Dacon62 Yes, that is what I meant by doubling up the bunks, but I think you need more than 1/4”, easy answer seems to be just adding a 2nd 2x6 on top. Maybe 1x6 deck board would work too, would have to re measure.
  • raynrayn Posts: 376 Baller
    You guys have me worried I must be doing something wrong. I have a Sunstream cantilever lift and use the bunks at factory settings and try to get it level as possible. Seems to work fine. I have bow guide so it is basically in the same place on the lift every time.
    Ray Newmark -
  • skimtbskimtb Posts: 159 Baller
    @rayn Seems most people are doing as you say. I’m just really really picky....
    The new trailer has 3-4 sets of bunks (depending how you look at it) to accommodate to hull shape, so finding a setting for 1 set of bunks to “match” the trailer is not easy.
    Due to the fact many are not worrying about it and having no issues, it could be waste of effort / time.
  • HortonHorton Posts: 26,537 Administrator
    @3mustskiteer I haven't measured it but it's the standard width that comes with the Basta lift.

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  • epnaultepnault Posts: 216 Baller
    My set up is actually different from all common approaches. The front of my bunks are wider at the front and narrow at the transom. Much of this was based on the trailer setup and by just looking at touch points on the hull that are flat. It has a funky bottom hull. I also want my bunk as close to the keel as possible
  • MichaelWiebeMichaelWiebe Posts: 21 Baller
    @skimtb Your dimensions are similar to mine. My measurements are bunks center-to-center, approximately:
    - 53" in the front.
    - 63" in the back.
  • paulpaul Posts: 36 Baller
    I would think that bunk locations on a lift are much less important than a trailer given there is no dynamic forces involved with a lift. From a structural aspect, so long as there was no interference with hull features, I would advise the bunks to align with the boat stringers.
  • skimtbskimtb Posts: 159 Baller
    Yes I need to go to 63” on back instead of 60”. Finally put boat on yesterday and got a view... 60” would work for 2x4’s but need wider for 2x6.
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