CDI furler modification

Discussion in 'Ask A Macgregor Owner' started by Bfranchini, Jul 12, 2019 at 1:30 PM. Add this thread to a FAQ

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  1. Bfranchini

    Bfranchini

    Joined Nov 8, 2014
    151 posts, 16 likes
    MacGregor 26S
    Ca Chateauguay
    CDI furler modification

    My Mac26S came with a CDI furler that must be the clumsiest furler ever designed. Has anyone tried to modify the furler with a top sheave and a halyard that runs outside the foil? I’m tired of risking a heart attack every time I want to change my head sail.
     


  2. Sumner

    Sumner

    Joined Jan 31, 2009
    5,250 posts, 289 likes
    Macgregor & Endeavour 26S and 37
    US Utah's Canyon Country


    DrJudyB likes this.
  3. Kermit

    Kermit

    Joined Jul 31, 2010
    5,253 posts, 2,605 likes
    Hunter 260
    US Lake Murray Sailing Club, SC
    Seems to me the CDI is not a good choice if you’re changing your headsail often. Maybe someone will have a solution for you.
     


  4. Bfranchini

    Bfranchini

    Joined Nov 8, 2014
    151 posts, 16 likes
    MacGregor 26S
    Ca Chateauguay
    I own a brand new 100% jib and an older 150% Genoa. I usually use the Genoa but it has no UV protection so I would like to stow it. I just repainted my deck and did a lot of useful modifications and I can’t afford to install a UV strip this year. I once saw a picture of a Mac with a furler just like the CDI but with an external halyard and a sheave at the top, so I was wondering if anyone has that solution installed and how it worked. Besides even without changing the headsail, installing it is a major PITA.
     


    DrJudyB likes this.
  5. Meriachee

    Meriachee

    Joined Aug 1, 2011
    3,335 posts, 1,160 likes
    Catalina 270
    CA Wabamun - on the orange ball
    Cdi is not made to change sails easily. Funny thing about this question is that you’re likely going to spend way more money getting a foil and blocks setup than it would cost to get a sunbrella strip sewn on.
     


    Justin_NSA likes this.
  6. sailme88

    sailme88

    Joined Jan 19, 2010
    195 posts, 64 likes
    Catalina Catalina 34
    US Casco Bay
    I had a CDI on an Oday 272.. Piece of crap.. The extrusion connecters worn out easily and would allow the different foil extrusions to independent turn. This action would tear the luff tape. took the whole mess to a loft. Their professional fix was stop gap at best. Ended up replacing with a Hood system and sold the boats shortly after. The CDI is in the Hood box in my basement. Tried to give it away several times... no takers
     


  7. DrJudyB

    DrJudyB

    Joined Jun 25, 2004
    457 posts, 369 likes
    Corsair F24 Mk1
    003 US San Francisco Bay, CA
    That’s either an ancient first generation Cdi, or its made by somebody else.

    For the past twenty years or more, CDI furthers have had a one piece plastic extrusion. There aren’t any connectors nor any sections.

    CDI furlers are dependable and very low priced. You can’t beat the price with any other brand
     


  8. Meriachee

    Meriachee

    Joined Aug 1, 2011
    3,335 posts, 1,160 likes
    Catalina 270
    CA Wabamun - on the orange ball
    Got that right. The newest ones have a shiv up top, so the melt/wear that used to happen up there is a thing of the past.
     


    joel@CDI likes this.
  9. Fred

    Fred

    Joined Sep 27, 2008
    423 posts, 49 likes
    Hunter H26
    CA Nepean Sailing Club
    What do you mean by this? Are you referring to the wear where the halyard doubles back on top? Is this new arrangement that you describe a backwards compatible replacement part for older versions?
     


  10. Fred

    Fred

    Joined Sep 27, 2008
    423 posts, 49 likes
    Hunter H26
    CA Nepean Sailing Club
    It just occurred to me that you intended to type “sheave”. That makes it clearer to me.
     


  11. AaronD

    AaronD

    Joined Aug 10, 2014
    272 posts, 116 likes
    Catalina 22
    9874 US Newberg, OR / Olympia, WA


  12. Meriachee

    Meriachee

    Joined Aug 1, 2011
    3,335 posts, 1,160 likes
    Catalina 270
    CA Wabamun - on the orange ball
    The guy made the comment himself "I don't care about the effect on set" Pretty much says it all.
     


  13. AaronD

    AaronD

    Joined Aug 10, 2014
    272 posts, 116 likes
    Catalina 22
    9874 US Newberg, OR / Olympia, WA
    I thought he was saying "Paint is lighter than Sunbrella or other UV-stable fabric; it should set better than a fabric UV cover, but I don't really care about that advantage, mostly about the weight flogging on the leech." But maybe I misread his intent. I'm sure we can expect a full report in PS sometime.
     


  14. DrJudyB

    DrJudyB

    Joined Jun 25, 2004
    457 posts, 369 likes
    Corsair F24 Mk1
    003 US San Francisco Bay, CA
    About 5 years ago, CDI upgraded the top cap on the FF2 to include a sheave.
    All the bigger CDI units have had a sheave in the top cap for many, many years.
    The FF1 doesn't have a sheave in the top cap, and, IMO, it doesn't need one.

    If you need to replace the top cap on an older FF2, it will fit the extrusion. The FF2 extrusion shape hasn't changed in the past decade or two, so the new part is backwards compatible with older FF2's.

    The halyards on the older version sometimes wore through the plastic cap after many years. (Some folks thought they melted, but I don't think so)CDI decided to improve the product about 5 years ago, and made the change.

    The CDI manual for the FF2 doesn't reflect the new change, but they sent all the dealers an update about 5 years ago.

    Judy B
    CDI Distributor
     

    Attached Files:



    Last edited: Jul 15, 2019 at 9:12 AM
    SkookumZac likes this.
  15. Fred

    Fred

    Joined Sep 27, 2008
    423 posts, 49 likes
    Hunter H26
    CA Nepean Sailing Club
    Great information DrJudyB! I'll take a closer look at the top of my furler to see what I have. I struggle with raising the jib especially the last few feet. This could make a big difference.
     


  16. DrJudyB

    DrJudyB

    Joined Jun 25, 2004
    457 posts, 369 likes
    Corsair F24 Mk1
    003 US San Francisco Bay, CA
    Hi Fred,

    YOu have an FF2 on your H26?

    Inspect the top cap for obvious wear from the halyard. If the halyard has started to cut through the plastic, replace the top cap. If it's not badly worn, through, I wouldn't bother to replace it, because you've got a problem somewhere else.

    It sounds to me like the problem may also have a different cause of excessive friction, not due to the top cap. ontribute to the friction. If the friction increases as you hoist the sail, it could be due to dirt in the groove or a problem with the luff tape.

    Inspect the extrusion for damage up near the top.
    Clean the extrusion and lube it with MacLube.
    Also spray the luff tape generously with MacLube.
    Don't use a pretroleum or oil based lube like WD40 on the luff tape. It leaves an oily residue that holds dirt. MacLube repels dirt and won't stain your sail. It lasts longer than other dry lubes too.

    If it's still difficult to hoist the all the way to the top, your luff tape may be too big for the extrusion. Measure the luff tape with calipers, with the calipers lightly touching the rope. Don't squeeze with any pressure. The tape should measure less than 5.6 mm in diameter. If it's bigger than that, it will cause more friction during hoisting than the system was designed to handle. The CDI requires a number 6 luff tape, which converts to a metric size of between about 5.1 and 5.6 mm, depending on the weight and weave of the dacron cloth wrapped around the inner cord.

    Judy B
    Retired Sailmaker.
     


    Last edited: Jul 15, 2019 at 9:10 AM
  17. sailme88

    sailme88

    Joined Jan 19, 2010
    195 posts, 64 likes
    Catalina Catalina 34
    US Casco Bay
    That furler was OEM. It came on a 1986 Oday. Your experience may limited to newer versions.
     


  18. Bfranchini

    Bfranchini

    Joined Nov 8, 2014
    151 posts, 16 likes
    MacGregor 26S
    Ca Chateauguay
    Hi, thanks for your answer
    I checked the luff tape and it’s the right size, I might have to change the top cap. I mange to raise the sail by pulling down on the halyard and pushing up the sail, this only starting halfway up.
     


    DrJudyB likes this.
  19. DrJudyB

    DrJudyB

    Joined Jun 25, 2004
    457 posts, 369 likes
    Corsair F24 Mk1
    003 US San Francisco Bay, CA
    No, my experience is not limited to newer verskions of CDI furlers. Reread my post

    I got it right. Spot on right. I said it might be an ancient first generation CDI., I went further to say that subsequent generations, for a minimum of 20 years, were good pieces of equipment. That 1986CDI furler was indeed a first generation and, IMO, ancient at 33 years old.

    IMO, You got it wrong when you implied that all CDIs were crap.

    Judy B
    Authorized CDI Distributor
     


    Last edited: Jul 17, 2019 at 3:23 PM
  20. Meriachee

    Meriachee

    Joined Aug 1, 2011
    3,335 posts, 1,160 likes
    Catalina 270
    CA Wabamun - on the orange ball
    Hardware should be proportional to the installation, and hardware will evolve over time from the manufacturer.
     




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