Jump to content

Grease for 149 piston


Recommended Posts

Hello all,


I bought a new 149 a while back but it had a horrendously stiff piston. I sent it back for a replacement and after two fills it’s now stiff again.


admittedly it hasn’t had much use, but it’s been over a year so I don’t think I can send it back.


I’ve ordered a tool to dismantle it (god help me) because I lament the cost of sending it back to fix what seems to be a common issue.


Any suggestions for what grease to use on the piston?


thank you and prayers appreciated…

Link to comment
Share on other sites

  • Replies 6
  • Created
  • Last Reply

Top Posters In This Topic

  • dbs


  • Mercian


  • MikeGB


  • Karmachanic


Top Posters In This Topic

Molykote 111.  10gr will last a long time

Add lightness and simplicate.


Link to comment
Share on other sites

Any brand of 100% pure silicone grease will be fine.


Scuba stores sell it in tubs or tubes of 7g - 10g. Should be in the £6 - £10 range.


I bought a 7g tub a decade ago, and have been using it to lubricate the pistons on my 5 Pelikans, my Lamy 2000, and my Geha Schulfüller.

At my current rate of consumption, I reckon that the 7g tub holds sufficient grease for approximately a thousand years!


Foul in clear conditions, but handsome in the fog.


Link to comment
Share on other sites

(knowing this may cause a stir again as it did in the past) ... I use pure (perfume free) vaseline as noted in an original, internal Montblanc service document and as  recommended by an Montblanc employee to me.





Link to comment
Share on other sites

For some reason, I found new Montblanc pens do not apply or only apply very little grease now. If you do not use, piston will become stiff. 


Maybe grease will enter into feeder and causes more serious return/repair issue. They just want you have at lease a happy 1st year.

Link to comment
Share on other sites

23 hours ago, Michael R. said:

(knowing this may cause a stir again as it did in the past) ... I use pure (perfume free) vaseline as noted in an original, internal Montblanc service document and as  recommended by an Montblanc employee to me.





Modern vaseline sold at cosmetic store only contains very little Petrolatum, the other parts are mostly water soluble. After several uses, all water soluble thinner will be washed away and leaving thick, dense Petrolatum which will cause stiffness.


Silicone based grease can give you more stable user experience.



Link to comment
Share on other sites

I, and other people who know MB pens better than I do, use silicone grease.  The Dow Molykote 111 is an excellent product, and safe with plastics, backed up by a friend who looked at the mfg. information.  It is designed for plastics and 0-rings, and is made to resist washing off, so it works for a good long time.  I have used it for over a decade on MB and Pelikan seals without any damage to any MB.


Note - a little goes a very long way.  You don't to slather it on, just a very thin film is all that you need, almost to the point where if you can see it, you have too much.

Visit Main Street Pens
A full service pen shop providing professional, thoughtful vintage pen repair...

Please use email, not a PM for repair and pen purchase inquiries.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Most Contributions

    1. amberleadavis
    2. PAKMAN
    3. Ghost Plane
      Ghost Plane
    4. inkstainedruth
    5. jar
  • Upcoming Events

  • Blog Comments

    • bramley
      I have the Sailor Naginata and some fancy blade nibs coming after 2022 by a number of new workshop from China.  With all my respect, IMHO, they are all (bleep) in doing chinese characters.  Go use a bush, or at least a bush pen. 
    • A Smug Dill
      It is the reason why I'm so keen on the idea of a personal library — of pens, nibs, inks, paper products, etc. — and spent so much money, as well as time and effort, to “build” it for myself (because I can't simply remember everything, especially as I'm getting older fast) and my wife, so that we can “know”; and, instead of just disposing of what displeased us, or even just not good enough to be “given the time of day” against competition from >500 other pens and >500 other inks for our at
    • adamselene
      Agreed.  And I think it’s good to be aware of this early on and think about at the point of buying rather than rationalizing a purchase..
    • A Smug Dill
      Alas, one cannot know “good” without some idea of “bad” against which to contrast; and, as one of my former bosses (back when I was in my twenties) used to say, “on the scale of good to bad…”, it's a spectrum, not a dichotomy. Whereas subjectively acceptable (or tolerable) and unacceptable may well be a dichotomy to someone, and finding whether the threshold or cusp between them lies takes experiencing many degrees of less-than-ideal, especially if the decision is somehow influenced by factors o
    • adamselene
      I got my first real fountain pen on my 60th birthday and many hundreds of pens later I’ve often thought of what I should’ve known in the beginning. I have many pens, the majority of which have some objectionable feature. If they are too delicate, or can’t be posted, or they are too precious to face losing , still they are users, but only in very limited environments..  I have a big disliking for pens that have the cap jump into the air and fly off. I object to Pens that dry out, or leave blobs o
  • Chatbox

    You don't have permission to chat.
    Load More
  • Files

  • Create New...