I recently bought a Parker 51 Vacumatic. The pen was heavily used. However after, changing the filler unit, the diaphragm, cleaning the collector the breather tube and polishing, the pen looked like new. I was excited and all, filled it with Waterman Serenity Blue and begun writing with it. The line was very wet and the nib quite smooth (I did smooth it at a little). However after a few words the pen started to dry and then the inkflow stopped. I shook it a little, again wet line and after a few words dry. Does, anyone have any idea whats the problem and how can it be fixed. The nib has no baby's bottom, the collector feed and breather tube are super clean the nib is aligned with the feed and the collector slot. The only thing I suspect that may be causing this could be that the breather hole does not have a tiny hole on its side. The aerometric breather tube does so that tiny amounts of ink can flow to the feed. Are vacumatic breather tubes supposed to have a tiny hole on the bottom and the side, like the aerometric? If no is there any other reason I may have missed that causes the nib to run dry?
Thanks in advance,