Originally Posted by Dave Berry
That's a PVC tube. You will need to remove the transom from the black PVC yoke and remove the yokes from the tube. The fabric floor will also likely have to be pulled away from the tube about 4 to 6 inches forward from the transom. After taking everything apart, remove the old glue with lots of rags and MEK. Once you have removed the old glue and have clean PVC and wood you can put it back together. Use 2 part polyurethane based adhesive to reassemble. We can supply the adhesive and solvents. PM me if you would like more information.
If you already have transom/tubes separation time problems, maybe you should re glue the whole floor fabric as well, would be a pity to fix transom/tubes and in a short time experiment water filtrations throught the floor lateral seams.
My advise would be : If you have no experience gluing sibs, better perform the job with someone that has the skill to do it like Dave, this work can take lots of time, patience, special required tools and will need to glue in a control temperature environmet for the glue to solder well if you want a excelent long lasting work done.