I used a Garelick 19615 ladder. You need to be able to access the inside of the stern of the boat under the seat, so I bought a Beckson 103598 deck plate and Beckson 6848956 red storage bag. I centered the deck plate on the seat and cut the opening (don’t cut the opening to big, or your in real trouble) but did not mount the plate yet, as I needed the larger opening to reach inside. I now had the access I needed to the inside of the stern. I was then able to reach inside the boat to install the ladder. I positioned the ladder where I wanted it and drilled the holes to mount it. I felt there needed to be more support than just fender washers would give me so I bought a piece of ¼” teak to use as a backing plate for both sides of the ladder and using marine grade epoxy, glued the teak to the inside of the boat covering the holes I had just drilled. The two holes that are nearer the center and not under the seat, needed something to fill the void between the inside and outside walls of the stern, so I doubled up the teak and glued it in place to fill that void. Now that I was happy with my placement of the teak backing plates, I drilled through the teak and all the way through the stern, this is all above the waterline but I still used marine grade silicone to make everything water tight. The ladder needed two small spacers to lay flat so I used small pieces of teak for this. Once I was happy with everything, I used stainless bolts, nuts, fender washers and lock washers and mounted the ladder. Now it was time to mount the deck plate, I wanted to use the Beckson red storage bag which has a small plastic ring that MUST BE INSTALLED in place before the plate is attached to the seat. The seat has a small amount of curvature to it, meaning it is not flat, so while I was tightening the bolts to hold it down, I keep tightening and loosening the screw out cap and while it was still able to be unscrewed I stopped tightening the bolts. Once I was done with installing the deck plate and ladder, I installed another deck plate on the other seat just to even out the look and also to give me more storage room. I keep my handheld gps and wallet as well as my car keys and cell phone in these storage bags. This entire project took me about three hours, working by myself.
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Thanks Greg, I read this post in the beginning of the thread. My question was about how u installed the securing strap, this is not mentioned in your post. Also is there any specific reason the ladder has to be installed on the right side of the transom?
The strap is held on with a phillips screw and washer. The velcro strap wraps around the ladder when the ladder is up and is easy to reach from the water to unhook the ladder so it will unfold. There is no pressure on the screw at all so I was not worried about it pulling out from the hull. I do not have a motor mount on my boat and so could have mounted the ladder on either side of the stern. It looks like most people that do have a motor mount on their boats mount it on the port (left) side so I just picked the other side for my ladder.