As a preface, I am going on a Wisconsin trip in 6 weeks, and this weekend found some serious troubles with the boat. the problems are some I have expected to find, but didn't want to deal with until this winter after the boating season. I have a 1972 15' trihull larson. The hull is in very sound condition (sure some repair is going to be needed, but nothing major). I just bought the boat this spring with trailer and a very sound running evinrude 65 h.p. motor for $500.00.<br /><br />My boat was taking on serious amounts of water this weekend, and I could not figure out why. As I have now found, there is a drain on the starboard side, allowing water to drain from the bow. The tube that connected the drain hole to the starboard drain hole was broke in half, and everytime the drain would sink below the waterline, water would fill the boat. This lead me to looking further. <br /><br />I cut out a portion of what appeared to be damaged floor and found the entire floor had varied levels of damage. The stringers are soaked and can be picked apart with my thumbnail. Most of the foam is soaked.<br /><br />I only found 2 stringers (made of 4x4's !?!?!). Only the inside (inside towards the bilge area) was glassed. The outer sides of both didn't have any glassing (doesn't even appear to ever have been). <br /><br />So with all of that lead up my question is what are anyones thoughts on handling this. My initial thought was to run to Lowes, get a sheet of plywood, screw it in and call it a floor. After I get back from fishing trip, rip it all back up and repair right. <br /><br />Conversely while I have the inside of the hull exposed should I tackle the matter properly? <br /><br />Please bear in mind, without the boat the, the trip to WI is not going to happen. Since I am emotional about this (really really want the trip to go ahead) I am asking for anyones opinion who does not have a trip on the line.