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Thread: 84 35-3 sheave sizes?

  1. #1
    Contributing Member I
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    84 35-3 sheave sizes?

    Do any E 35-3 owners know the dimensions for the mast top sheaves? I replaced wire/rope halyards with all rope and have trouble with the splice going over the sheave.
    I won't be pulling the mast any time soon, so trying to figure it out ahead of time.

  2. #2
    Principal Partner Cory B's Avatar
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    Hello Joe,

    I don't recall exactly. When we bought our boat we pulled the mast. At the time the biggest line I was comfortable with was 3/8", although you might be able to use 7/16". Instead of splices I've just used knots, and cut them off ever few years to move shift all of the wear points. I think the problem with some splices is that not only are they wider, but they aren't as flexible (at least initially) and can have trouble fitting around a sheave. We used "modern" line which was so overstrength that I wasn't concerned about the "weak" knots. Its worked well for us.
    Cory
    1984 E-35III #163 "Balancing Act"
    Portland, OR

  3. #3
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    Can you check against your mast measurements?

    Kenyon 4873?

    http://www.rigrite.com/Spars/Kenyon_...3-cruising.php

    If so, scroll down for the sheave size.

    Max
    September Sun
    ERY35240D686

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    Senior Moderator Loren Beach's Avatar
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    Lightbulb

    When I changed out the original wire/rope halyards in our '88, with a Kenyon spar, I tried 3/8", and it works... but really has some noticeable drag where it goes thru the masthead sheaves. When I went to 5/16" very low stretch (T-900) line, no more problem.
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  5. #5
    Principal Partner Tom Metzger's Avatar
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    I had a 7/16" main halyard for many years that had no problem at the masthead. It died from chafe at the lower mast exit in 2015. There was no wear evident at any other location.

    I did replace it with 3/8" NE Ropes VPC from Milwaukee Rigging which has very good prices. Interestingly, their Ebay store is much more expensive than their regular store. I have bought from them before and have had good service.
    Tom Metzger
    E-34 Xanthus

  6. #6
    Advanced Beginner bgary's Avatar
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    I don't know what size the sheaves are for a 35-III, but I'll share that the sheaves on a 32-III are 2.5" diameter, 0.475" wide and nominally sized for 3/8" line.

    All my current halyards are 3/8", all rope. I've got a spin halyard that is telling me it wants some attention this year, and I'm probably going to replace it with 5/16" VPC so that it runs free with minimal resistance from masthead or exit slot.

    My main and jib halyards will likely stay 3/8"... jib only goes up and down a few times a season, the rest of the time it is furled; the main halyard stoppers are sized for the 3/8" line and it ain't broke, so no need to change it.

    $.02
    Bruce

    ETA: photo of 32-III masthead with 3/8" halyards. I think I have a photo of one of the sheaves, too, if that's of value...

    Name:  halyards.jpg
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    Last edited by bgary; 04-19-2017 at 03:17 PM.
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  7. #7
    Principal Partner EGregerson's Avatar
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    sheaves

    when i swapped out a couple of my sheaves (like 10 years ago) i noted that they had a 'V' shaped design to accommodate the wire; discussions suggested that with a wire to rope conversion, u should change to the 'U' shaped sheave; also to avoid any potential burr damage to the new rope.

    a little more research: cruisersforum: the swap to rope while retaining the original V shape reduces the safe working load by compressing the rope in the V groove.
    Last edited by EGregerson; 04-19-2017 at 06:33 PM.
    Valinor 1987 E34 Hull#243

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    Moderator Christian Williams's Avatar
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    Many of us have been advised that the wire sheaves accept rope with no problem. Worth further research.
    Thelonious II, E381 hull 513 (1984) Universal 5432
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  9. #9
    Advanced Beginner bgary's Avatar
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    Yes, all-rope halyards will work fine over sheaves made for wire/rope halyards.
    "Makana" (ex-Thelonious)
    1985 Ericson 32-III #604
    Makana blog: here

  10. #10
    Contributing Member II
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    Up the mast

    Quote Originally Posted by Christian Williams View Post
    Many of us have been advised that the wire sheaves accept rope with no problem. Worth further research.
    After replacing my Halyards I went up the mast to do some work and decided to inspecte the sheaves accepting the rope. I can say on my '83 35-3 I have no issues with the current set up using all rope.
    Darrel
    E35-3 #154
    s/v Sunflower

  11. #11
    Contributing Member I
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    Thanks

    Thanks for all of the input.
    Very much appreciate it.

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