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Cleaning the Pilot Custom C74


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I had a bit of trouble cleaning my Custom 74, clearing some stubborn Robert Oster Fire River ink.  I had to flush out the pen so many times I think I have weakened the suction and now it is only drawing up a tiny bit of ink.  Is there any tricks I can perform to get the suction back up, maybe fill it with a fluid that will help it to seal better?  I see one seller lists the CON-40 converter replacement as an optional accessory.  Will this converter work on the C74?  Thanks.

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A Smug Dill

A CON-40 converter, by design, will work in a Pilot Custom 74 pen, and any other model in the Custom product line.


As to how you weakened the suction (in what? You didn't specify which converter model you were using, and one should not assume it is a CON-70 simply because that is the one many C74 users seem to prefer, on the bases of capacity and availability), I wouldn't have a clue, and so cannot begin to suggest how to remedy the problem.

I endeavour to be frank and truthful in what I write, show or otherwise present, when I relate my first-hand experiences that are not independently verifiable; and link to third-party content where I can, when I make a claim or refute a statement of fact in a thread. If there is something you can verify for yourself, I entreat you to do so, and judge for yourself what is right, correct for valid. I may be wrong, and my position or say-so is no more authoritative and carries no more weight than anyone else's here.

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The converter is the one normally installed in the pen as I have never replaced it.  I need a CON-40 replacement for another Pilot pen and it is relatively cheap.   When I first noticed a problem, that the converter was not drawing much ink, I looked online for the converter and found it listed for $30 US.  However I have subsequently found them listed more around the $11 range and that's more manageable.  Also - apparently Pilot has changed the design of the converter and I saw a Goulet video on YT about that.  The older converter can be dissembled and that makes cleaning much easier.  I think I got the information I need now.  Thanks.

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