riken floor delam - Mountain Buzz
 



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Old 02-02-2011   #1
 
Wilson, Wyoming
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riken floor delam

I have an older riken shoshone which has developed a bubble in the rear portion of the sb floor. It still holds air just fine but I'm worried about it grenading in the middle of a trip. Any thoughts on how to fix this? I like the boat and other than that it's in fine shape so I wouldn't mind putting some work into it. Can I slice it open and glue the two layers back together then patch the incision?

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Old 02-03-2011   #2
 
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Oregon City, Oregon
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I had the same thing happen with my Cheyenne (probably the result of water inside the floor). I shipped the floor to a specialist in California who reported back that it was unrepairable. He hooked me up with a factory-refurbished Hyside floor that I was able to fit--with the addition of some grommets. Later I found a new old stock Riken floor on E-bay.

I don't think you have much to lose by cutting it open. The issue in mine wasn't just separation of the I-beams. In fact, the I-beams themselves had torn apart (most likely because of mildew-related deterioration), and there just wasn't any practical way to replace them.
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Old 02-03-2011   #3
 
Wilson, Wyoming
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Damn. Thanks for the info though. Looks like I'm gonna open that can o' worms.
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Old 02-03-2011   #4
 
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I don't know if will work, but there is a sotar floor for sale on their site. Used Rafts | SOTAR

otherwise, maybe you could buy a saturn floor and inflate it over the old floor
RM Rafts, LLC - Top Low Cost Provider, Raft Packages, Rafting Supplies

might be an option...
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Old 02-04-2011   #5
 
Aurora, Colorado
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Steve,
Does your floor have 3 independent sections? If so, I may have a floor section for you. I'd have to blow it up to see if it is still in good shape. Let me know if I should dig it out and check. . .
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Old 02-05-2011   #6
 
Willi..., Willimina, OR
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Insert a hypo needle full of contact adhesive into the bubble. Press flat until set is complete.
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Old 02-06-2011   #7
 
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Quote:
Originally Posted by garystrome View Post
Insert a hypo needle full of contact adhesive into the bubble. Press flat until set is complete.
What you're addressing is a delamination of the raft material--the external coating separating from the fabric. This happens after the internal coating has broken down, allowing air to pass through the fabric and form bubbles. I've seen this happen many times on blue Riken rafts, but never on the gray ones, like this Shoshoni.

And in any case, sealing the bubbles down with glue in a syringe is at best a temporary fix, since it can't address the underlying problem.

But as I interpret the problem with the Shoshoni, it is not surface delamination, but rather ballooning of the entire floor structure. This is what commonly happens when the internal I-beams tear or separate from the top and bottom layers of the floor. It universally results from water inside the floor, combined with the fact that Riken never installed pressure relief valves in their floors.

Typically, the failure mode begins with weakened I-beams or I-beam adhesives. Then when the raft is pulled out of the river, the air inside the floor quickly expands, causing the I-beams to separate or tear. The result is that the floor (or part of it) takes on the appearance of a pillow instead of an air mattress. And as I said before, it is not practical to repair this kind of problem.
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Old 02-07-2011   #8
 
Wilson, Wyoming
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Quote:
Originally Posted by climbdenali View Post
Steve,
Does your floor have 3 independent sections? If so, I may have a floor section for you. I'd have to blow it up to see if it is still in good shape. Let me know if I should dig it out and check. . .
Unfortunately it's one piece. Would be great if I could just replace one section.
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Old 02-07-2011   #9
 
Wilson, Wyoming
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Quote:
Originally Posted by garystrome View Post
Insert a hypo needle full of contact adhesive into the bubble. Press flat until set is complete.
It's a pretty big bubble. About one square foot. Think that would still work?
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