How To Prime Your Fountain Pen
Whether you are using an ink cartridge or the converter pump, a new fountain pen must first be primed with ink. Ink must be in the feed groove, in the feed wings, and under the nib before the fountain pen will write properly.
Prime the pen by squeezing the cartridge. You need to see a lot of ink come out of the tip.
Here is a short video on how to prime your fountain pen: