Those who said that moving the jib sheet leads outboard, towards the
side of the boat, would reduce the boat's ability to sail towards the
wind were correct. This is a less than optimal solution; obviously
having the jib sheet leads rip out is no way to get to windward either.

Terry Spragg wrote:

Get some 5 minute epoxy, in twin tubes. Fill the screw holes with mixed
epoxy and toothpick wood. Drill and tap for new screws.

If the fiberglass is too thin to start with, this won't help. He needs
to put in some backing plates.

Cut a slightly larger than hand sized round hole in the side of the seat
under the thwart, where you can reach the underside of the screws. Put
backing plate under the screws- a small piece of Lexan does great.
Another material I like is HDPL cutting board... buy a kitchen cutting
board at Wal-Mart for $4.99 and get a whole set of backing plates.
Doesn't rot, plenty strong, and self tapping, too.

Now to seal up the access hole- if you want to do it properly, and get
back in there at some future date, get a pair of access hand-hole plate
from one of the marine suppliers. Another option is to save the cut-out
part and refiberglass it into place with a little resin & fiberglass
tape from Home Depot.

Fresh Breezes- Doug King