Originally Posted by AndrewMK2GR
I cleaned and re-greased the valves this evening; they now turn smoothly and seem to be working properly. After working on the valves I inflated the boat and gave it a once over. It held air fine and I could find no immediately apparent leaks. I found no seams that felt loose or that had edges peeling (other than those listed below).
I inspected the glue joints on the thrust board and found them to be in poor shape. I could probably peel the flaps off of it by hand. I think I will need to remove the thrust board, refinish it, clean the flaps, and then glue it all back together. Are there any tips or tricks for this job that I should be aware of? What glue is recommended for this repair? Is any marine varnish acceptable for refinishing the thrust board?
I also inspected the glue joints at the transom. I think that they are in overall good shape, with 2 exceptions. The pieces of material with velcro on them on either side are loose and will need to be reglued. The inside seam on the starboard side has some loose edges, but they are not nearly as loose as the flaps on the thrust board are. Can I just reglue these edges down? The transom could also use a new coat of varnish, is any marine varnish acceptable?
I would not recommend ungluing the thrustboard. It is a very labor intensive procedure to glue it back in properly. Not to mention that due to the age of the boat, when you go to unglue things, rather than ungluing, the hypalon may separate between the layers leaving cord structure and neoprene backer behind.
Any marine grade polyurethane type varnish is acceptable. I tend to gravitate towards Interlux products. Service manuals typically recommend 3 coats.
I would recommend washing the vessel. It would also give you time to check for leaks. Dawn Dishsoap or Simple Green are okay.
For reglue, Weaver Industries is in Rathdrum, ID. They sell adhesive. :
Weaver Industries, Inc.: HYPALON GLUE KIT
It is recanned Bostik 2402 if I remember properly.
It would be wise to water test the boat.
Add the drain plug and fill it up with water like a bathtub. It helps to block up the bow, most of the water leaks occur at the transom. About 4 inches of water is enough. The water weight will cause water to squirt out wherever a leak is. If there are no leaks, then simply empty the water. If there are leaks, they can be sealed by regluing loose material or in the case of small leaks, with 3M 4200, Sikaflex, or similar PU type caulks.
Keep in mind that water and glue/caulk are not compatible. Allow the boat to dry before starting repairs.