.Looks like a live and learn situation..I would have left the boat with the owner..BUT..you can't cry over spilled milk..We have to see if we can't salvage the vessel..

Everytime I look..the crack looks much worse..What do you mean by drilling it out ?

First..I would go to Lowes and see if they could suggest something...something similiar to what you use on cars..but you need something that will work on plastic..you need something with some substance...

After looking again..I'd use Shoe Goo as a last resort..I'd try to find some kind of resin type stuff that would work similiar to fiberglass like patching up a dent on a car..Check with Lowes..

I'm going to pray for you this morning that God gives you some wisdom in fixing your boat..He's always my first resource. { -;