I've got an 1993 javelin 379t. There's a livewell/cooler to the left of the passenger seat. It will get water in it when I'm in the lake but will not drain. Any ideas?

Not sure if there's a valve in there or not, but if you can get it to a point where you know the drain is supposed to be open, fill the well with a couple inches of water (to make a good seal) and hit it with a toilet plunger. Suck or push whatever's blocking that drain out of the way.

 

Another idea is to do an experiment when the boat hull and bilge area is dry. Make sure the plug is out in the back.  While all is setting on the trailer and good and dry fill that compartment/cooler half way with water. Watch the rear or the hull and inside the bilge area. If that water level in the compartment drops see where it is going to.

Ok thanks guys.