1. HI, i also have a Suunto compas on a bavaria 37 that has lost its fluid.. Am about to dismatle it to try and replace the bello that i suspect is dammaged. i am intrested in one of your replacement bellows to repair the compass as spares are not avaliable as you alreqady know. Please let me know if you are able to post a replacement to me on the Isle of man where we are based. I look forward to hearing from you and my compliments on a great write up to this problem.

  2. Hello together!
    My suunto compass just lost almost all oil (bought the boot recently Bav 31 1999) i do not see any cracks on the below part and also no signs of oil where glas is connected with black plastic. Only place where stil oils is coming out is the lowest part , where is a hole. I ‘ve tried to check what is inside ,looks a rubber gasket or membrane. If I stick this hole with oil resistant glue (or clean it properly the surface) I think can refill the compass with baby oil..😉 Do you think it will be a solution or even if I do not see cracks or damag on the plastic this make no sence? Thx Mate-Hungary

    1. Inside the plastic cover there is a membrane, and these fail from old age. That’s why I designed and printed a new one. I do not think plugging the hole at the bottom will work, as a flexible membrane is needed to let the oil expand and contract due to temperature. I guess it will start to leak again after a few temperature cycles.

      1. Aah no I got it. And Your poliurethane materiel is flexible enough instead the original hard plastic + membrane inside

  3. Hello, I already dismanteled the compass so I only need the cup with clamp and the new LED. Wat would be the price for the set (without the vise for dismanteling) including postage to the Netherlands ??
    My tip : after filling the compass put it in the freezer for some hours , the liquid will crimp. Take it out of the freezer and fill-up the compass again. Repeat if nessessary. This will during normal temperatures cause an overpressure inside the compass wich is absorbed by the flexible cup. It prevents that during temperature variations the inside pressure becomes lower than outside resulting in air being sucked in the compass causing air bubbles. This is the exact reason why every compass has a membrane to keep the pressure inside on a steady level ( just like Your central heathing).

    Best Regards Bas ( Dehler 35 Cruising )

    1. If you place an order for the kit I’ll remove the vice-tools and throw in the LED for free.

      1. Hi,

        I just placed the order , hope I can save the compass with it , I will keep You updated….Bas

  4. I think you should be able to pay via paypal without having an account, just using your debit/credit card.

  5. Please reply to me.
    You can give me also an IBAN Number, I would pay in advance.
    No answer receved so far.
    August, 27, 2021

    1. Hi. You shouldn’t need an paypal account, it should be possible to use a payment card in the checkout without creating an account. Have you tried it?

  6. Have you double checked the fluid type before giving advice? Many compasses use Isopar L which is a low viscosity hydrotreated heavy naphtha. Sounds fancy but not too hard to find in marine and aeronautical supply.

    1. I couldn’t source Isopal L locally, so I went with baby oil (mineral oil) that had been suggested at other forums. It has worked perfectly for my two compasses. Other brands/models might differ and everyone should check before they pour liquid into theirs. I’ve only tested my 3D-printed parts with baby oil, not with Isopar. According to the material datasheet (https://fiberlogy.com/wp-content/uploads/2018/03/TDS-FiberFlex-30D.pdf) it’s resitance to naphtalene is “fair”. So I cannot be sure that it’ll work as well as with baby-oil.

  7. Hey,
    I have 2 Suunto B116 Sail, Both leaking.
    What would 2 new membranes cost (plus the items to open the kettle).
    Incl. Posttage Paid.
    André Wijsenbeek