This sounds like water intrusion from leaky window seals. I've resealed mine many times.
If Sunrunner owners or old boat enthusiasts are still viewing this thread, I wonder if anyone has attempted to replace the floor and transom on an 18' Sunrumner. I have 1978 (190CV?) that has been repowered and updated, but the floor is now starting to show some give, and if I do the floor I would want to do the transom. I love the design, look and ride quality - especially with updated interior, assessories, engine and drive, and would like to take a shot at removing the inner hull liner or cutting it at the floor and transom for replacement. I'm aware that the hull liner plays a role in maintaining structural rigidity, so if it's impossible to remove the liner (foamed and glassed in?) I would want to reinforce the cut area as best as possible. Can anyone comment on best practice when doing this kind of repair on a Sunrunner or boat with an inner hull liner? I'll start a new post on this if this thread is no longer active. Thanks for any thoughts
