I'm getting ready to motor out the Erie Canal so I changed the packing. I didn't know the size and used 3/16 but it didn't quite fill the gap between the nut and shaft so I cut one the size of the nut and another the size of the shaft so they'ed fill the gap. The drip rate is controlled correctly but now I have some bronze dust in the bilge drain as shown in photo.
Looking for suggestions as what is causing this and what I should do to stop it. I used syntek PTFE and lube. I have some more with me so I could change it out at the next anchorage if I can identify the problem.