I did this 2 years ago and it was not that big a deal for me. Here is the details from my old post.
First you remove the gunwale storage on the side with gas cap. Next there are 3 screws and a bolt. The two (2) ½ inch outside screws bed to the fiberglass deck. The inside screw is actually a 2 inch bolt that attaches to a grounding wire and then a nut. You remove the screws first then the bolt. Make sure you catch the nut and don’t let it fall behind the gas tank.
Next there are two hose clamps, and in my case the thread head was facing forward and east to unloosen. Once they were unloosened I just worked the fitting up and down and spun it. The fitting was bedded in some 4200, but not much. The fitting came off the hose in about 3 minutes of tugging.
Once the fitting is out, there is an outside screw holding the chain clasp. You remove the screw and clasp, reattach either a new chain, or the remaining chain, and start the reattach process.
The only tricky thing on the reattach is to attach the hose the best you can first, and then put down a bead of 4200. Now tighten down on the bolt and nut for the ground while making sure the other two holes for the screws are aligned. This will draw the fitting down. Then put the other (2) screws back to seat the fitting in the 4200, and also push up to finish reattaching the fuel hose. When the hose is flush with the fiberglass decking from beneath, you know it is fully snug and you can start tightening the hose clamps. Then put the gunwale storage unit back in place.
Jim