Ok so Im almost afraid to ask, but I figure I better. I have this section of rotted floor under the front passenger seats of my 1970 19 foot Schuster jet boat. I've cut out the bad section which is 20.5 x 41.5 inches, with a couple inches left that I didtnt get, and my problem is, should I just cut across to just the next stringer or should I pull it from hull wall to hull wall and replace that whole section. What Im getting at is would I be better off leaving it alone and put the 20.5x41.5 inch piece of plywood in and glass over it, thereby covering up that little bit of rot that I didn't get just on the other side of the center stinger, which is still just under the seat frame, and would leaving the original floor in one piece under the driver seat front to rear alone, which would be better for strength? Im afraid to separate the plywood completely from front to rear for fear of introducing more twist in the hull. I was thinking that if I just fill the hole with 3/4 inch plywood and leave the rest alone that it would be better. Not too sure which way to go. This is the first time and Im determined to do everything myself. I figure I'll be back in it in 10 or 15 years to replace the whole floor anyway, and I'd like to see if I can get away with just patching it for now, because Im just not prepared to replace the whole floor. The rest seems in decent condition, no rot. I'll lightly glue the carpet in for now.
Based on what you wrote replacing the section would be fine and a lot easier. I don't believe the floor has much to do with the strength of the hull when I look at your picture.
Now that I've said that here's my experience with a floor with a section that was rotting. I thought the rest was fine because it felt solid when in fact there was wet rotting wood in places I didn't expect to find it. I found it because I decided to replace the entire floor.
I redid my floor last year and gel coated it as well...opened up a ski locker and under seat storage. New floor install
Thanks for the info. I checked out your link to your floor rework, nice. Im a newb and summer is coming up so I think I'll patch it for this year. Maybe I'll start that kind of project next year. Its so easy to get everything out of the hull to get to the floor, so I think I'll patch the floor and lightly glue the carpet in for now. This looks like something I'll tackle next year. I only take the it out 5 or 6 times a year, expensive to run (gas).
I used fiberlay in San Diego... The cheapo home-d stuff is not recommended. Check your local fiberglass business. You need the real thick sewn together glass. They have a higher end resin as well.
Thanks I'll check them out. One other question, since it's my first time I have an idea how to start pulling the floor out. Im going to do it next winter. What Im not sure about is the correct method for separating the plywood from the hull bottom . Im guessing its just fiber glassed over on the edges where the plywood meets the hull. Do i score the edge or cut thru the plywood an inch or two in and then work it loose... just guessing... How should I separate them? Want to do it on my own and forethought would be handy
Sometimes you will run into a few screws into the stringers then glass over. Just look for that. You want to be careful on the areas glassed to hull. I would score those. If you have a hand buffer grinder, I would get some coarse pads for it to sand. You need a good mask for your lungs to...