I have a late 70's Glastron Starflite 140 I/O Mercruiser. After getting
it ready for the first outing of the season after storage, I noticed a
fairly long (6') hairline crack on the bottom port side along the keel.
In some places it has widened to about 1/16th of an inch. Should I
be concerned? Should I sand and apply fiberglass resin or something to
it? I can take pictures tomorrow and host them if needed.

TIA