Page 1 of 2 12 LastLast
Results 1 to 15 of 17

Thread: Olson 34 Upper Shroud Rigging Question

  1. #1
    Contributing Member I
    Join Date
    Jul 2018
    Location
    King Harbor, Redondo Beach, CA
    Posts
    18

    Olson 34 Upper Shroud Rigging Question

    I'm in the process of replacing the standing rigging on my O34 and have a question for this group.

    [As background when I bought the boat I had it trucked to me. I wasn't at the yard when the boat was hauled and the mast was unstepped, and the rigging stripped.]

    Question relates to the upper shroud attachment at the mast. In the first picture there is a terminal fitting. The second is the hole in the mast that I assume this terminal slips inside. My question is that there is a hole in the mast where it would seem some kind of fastener would got (where my finger points). And a spot on the terminal where a fastener might go. But i have no fastener in what came with the boat. Anyone know how this is supposed to work. I can't quite get my head around what it should be.

    Thanks guys.

    RobClick image for larger version. 

Name:	UpperShroadAtMast.jpg 
Views:	18 
Size:	35.0 KB 
ID:	28063Click image for larger version. 

Name:	UpperShroudTerminal.jpg 
Views:	16 
Size:	39.7 KB 
ID:	28064

  2. #2
    Contributing Member II 67rway's Avatar
    Join Date
    Sep 2016
    Location
    Portland, Oregon
    Posts
    28
    Hello Rob,

    Mine has no mast hole nor fastener above the upper spreader opening, though I do have the same rectangularish holes in the internal shroud plates.

    It looks as though someone must have installed a bolt thru the mast and upper shroud plates in yours, for some reason. I could see some utility in sharing the load upward above the upper shroud mast opening, and have considered doing the same on mine.

    Out of curiosity, why are you replacing the standing?

    Bruce
    Olson 34

  3. #3
    Principal Partner Keith Parcells's Avatar
    Join Date
    Dec 2003
    Location
    Channel Islands Harbor, CA
    Posts
    861
    I might want to add a nutsert/rivet nut like with this, to put a screw into:

    https://www.summitracing.com/parts/wmr-w2006?rrec=true

    Cheaper ones are probably available too (Harbor Freight)?
    Keith Parcells
    1983 E-33
    Hull #24
    Rocinante

  4. #4
    Contributing Member I
    Join Date
    Jul 2018
    Location
    King Harbor, Redondo Beach, CA
    Posts
    18
    Keith - good point, maybe it was a rivet that used to be there not a screw like i was thinking.

    Bruce - so assume your terminals just rest in the hole with no physical fastener? This looks like it would work, but don't want to assume anything given the "stakes".

    I'm replacing all the standing rigging because I wasn't able to determine from prior owners if it had ever been replaced... so had to assume it was 30+ years old and past its service life (though it was all in good shape). I used the Defender rigging service. All new wire, terminals and turnbuckles for about $2000 in case anyone is considering it. Also, Defender uses the new KOS wire that is supposed to be particularly good.

  5. #5
    Contributing Member II 67rway's Avatar
    Join Date
    Sep 2016
    Location
    Portland, Oregon
    Posts
    28
    Quote Originally Posted by racushman View Post
    Bruce - so assume your terminals just rest in the hole with no physical fastener? This looks like it would work, but don't want to assume anything given the "stakes".
    Correct. They just rest in the openings.

  6. #6
    Moderator Christian Williams's Avatar
    Join Date
    Oct 2012
    Location
    Los Angeles
    Posts
    4,245
    Blog Entries
    78
    All the stemball tangs seem to have fastener holes in them. Is the hole in the mast threaded? If not, perhaps a stainless rivet. If they drilled the old rivet out, that would explain lack of a fastener.

    https://www.rigrite.com/Spars/SparPa...king_Shell.php
    Last edited by Christian Williams; 11-18-2019 at 10:56 AM.
    Thelonious II, E381 hull 513 (1984) Universal 5432
    Table of Contents for Thelonious Blog here
    Videos: http://www.youtube.com/c/ChristianWilliamsYachting

  7. #7
    Contributing Member I
    Join Date
    Jul 2018
    Location
    King Harbor, Redondo Beach, CA
    Posts
    18
    Hole does not appear to be threaded.

    My first idea to solve this was maybe a stainless sheetmetal screw, but that wouldn't thread up to with the square-ish hole in the cup.

    Can't imagine any way to use a nut on each side because I wouldn't be able to get any wrench on the nut inside the mast (well actually i could do one, but not the second)

    Only other thing i could come up with that would be a bolt it one long enough to go all the way thru the mast side-to-side with two locking nuts and washers inside the mast to avert any compression. This I think is possible, but then i wonder about internal halyards chafing on it over time.

    So all that leaves me thinking it must be a rivet that is the solution. Or maybe nothing at all as Bruce seems to have.

  8. #8
    Sustaining Partner Slick470's Avatar
    Join Date
    Nov 2008
    Location
    Virginia
    Posts
    210
    We have a very similar setup on our Olson 911 and ours has no fasteners. If you put anything back in there, a rivet seems like the best solution to minimize chafe.
    Andy H.
    1990 Ericson Olson 911S #149 Hawkeye
    Deale, Maryland
    Yanmar 2GM20F

  9. #9
    Contributing Partner CTOlsen's Avatar
    Join Date
    Sep 2009
    Location
    Mystic, CT
    Posts
    110

    Pix to come

    My boat is hauled and mast lowered. I'll take pix and post over the Thanksgiving holiday.
    CTO
    Craig T. Olsen
    Ericson/Olson 34 "Loki"
    Mystic, CT

  10. #10
    Contributing Partner CTOlsen's Avatar
    Join Date
    Sep 2009
    Location
    Mystic, CT
    Posts
    110

    No connector/screw/rivet

    Nothing used to keep this plate in place. Likely a tool at the factory was used with the mast head sheave box removed.These pix were taken with the mast down, in a horizontal storage rack, showing both sides of the mast. Lookeee Here....
    Click image for larger version. 

Name:	Cap mast conn1.jpg 
Views:	6 
Size:	72.3 KB 
ID:	28122Click image for larger version. 

Name:	Cap mast conn2.jpg 
Views:	10 
Size:	58.7 KB 
ID:	28123
    Craig T. Olsen
    Ericson/Olson 34 "Loki"
    Mystic, CT

  11. #11
    Contributing Member I
    Join Date
    Jul 2018
    Location
    King Harbor, Redondo Beach, CA
    Posts
    18
    Thanks everybody for the help and pictures on this question. I'm going to have the yard put a rivet in it since I've got the hole anyway.

    Last question on this thread... as I look at this setup which basically just depends on the structural integrity of the mast wall for all of the upper shroud load, it makes me wonder about the implications of 30+ years of stainless resting on aluminum. Has anyone come up with something to electronically isolate the mast and the cup, maybe tape? Marelube? Just wondering.

  12. #12
    Senior Moderator Loren Beach's Avatar
    Join Date
    Dec 2000
    Location
    Portland, OR. Columbia River
    Posts
    7,738
    Blog Entries
    66

    Lightbulb That's a busy area

    I would guess that you would pull the shortest rivet that will hold. Four lines (main, jib, two wing halyards) going by/near there, and the less places for chafe the better. Plus the wiring to the anchor light and also the cable to the wind transducer.
    1988 Olson 34 #8
    Sail # 28400
    Betamarine 25 (new 2018)
    Fresh Air
    Portland, OR USA

  13. #13
    Sustaining Partner Slick470's Avatar
    Join Date
    Nov 2008
    Location
    Virginia
    Posts
    210
    Quote Originally Posted by racushman View Post
    Thanks everybody for the help and pictures on this question. I'm going to have the yard put a rivet in it since I've got the hole anyway.

    Last question on this thread... as I look at this setup which basically just depends on the structural integrity of the mast wall for all of the upper shroud load, it makes me wonder about the implications of 30+ years of stainless resting on aluminum. Has anyone come up with something to electronically isolate the mast and the cup, maybe tape? Marelube? Just wondering.
    We had our mast down this past summer for new standing rigging. I didn't notice any corrosion between the stainless and the aluminum around these parts. I did give everything a liberal coating of tef-gel before reinstalling though. Can't hurt right?
    Andy H.
    1990 Ericson Olson 911S #149 Hawkeye
    Deale, Maryland
    Yanmar 2GM20F

  14. #14
    Principal Partner Keith Parcells's Avatar
    Join Date
    Dec 2003
    Location
    Channel Islands Harbor, CA
    Posts
    861
    Quote Originally Posted by racushman View Post
    Thanks everybody for the help and pictures on this question. I'm going to have the yard put a rivet in it since I've got the hole anyway.

    Last question on this thread... as I look at this setup which basically just depends on the structural integrity of the mast wall for all of the upper shroud load, it makes me wonder about the implications of 30+ years of stainless resting on aluminum. Has anyone come up with something to electronically isolate the mast and the cup, maybe tape? Marelube? Just wondering.
    Pipe wrap (insulation tape) works well for isolating dis-similar parts.stuff like this:
    https://www.homedepot.com/p/Advanced...-205155061-_-N
    Keith Parcells
    1983 E-33
    Hull #24
    Rocinante

  15. #15
    Advanced Beginner bgary's Avatar
    Join Date
    Aug 2015
    Location
    Everett, WA
    Posts
    1,362
    Blog Entries
    23
    Quote Originally Posted by Keith Parcells View Post
    Pipe wrap (insulation tape) works well for isolating dis-similar parts...
    +1 for pipe-wrap tape.

    I use it when (re)mounting anything that has flat-surfaces of dissimilar metals in contact (for example, underneath the antenna mount and masthead-light base at the top of the mast, under the flat-parts of the gooseneck and vang fittings at the bottom, etc).
    "Makana" (ex-Thelonious)
    1985 Ericson 32-III #604
    Makana blog: here

Similar Threads

  1. 32-2 rigging question
    By Schrewsburyduo in forum Cruising & Racing
    Replies: 1
    Last Post: 03-18-2014, 08:00 PM
  2. Rigging Question
    By Ed Valente in forum Maintenance & Mechanical
    Replies: 3
    Last Post: 10-28-2012, 10:11 PM
  3. Mast support without upper shroud
    By tremellose in forum Maintenance & Mechanical
    Replies: 15
    Last Post: 07-22-2009, 01:39 PM
  4. Olson value question
    By treilley in forum Maintenance & Mechanical
    Replies: 18
    Last Post: 02-17-2006, 11:12 AM
  5. E-25 rigging question
    By mstone in forum Maintenance & Mechanical
    Replies: 2
    Last Post: 12-22-2002, 06:33 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •