There is an F-Boat forum, you could try to join and ask there.
If the uphaul line appears to just be sticking out of the daggerboard, it's probably just glued in with epoxy
. This is how my uphaul line is attached.
To replace it, I extracted the board and laid it flat, cut the uphaul line flush, and drilled out the part that was glued into the board.
Then I soaked the end of the new uphaul line in epoxy
, filled the hole (about 2 inches deep, be careful not to drill right through the board though) with epoxy, then stuck the new line into the hole, taping it flush to the board.