After two seasons of procrastination I decided to replace the keel bolt. Water had been seeping in around the cupped washers and a planned 5 day excursion on the Prince William Sound justified the need. A previous inspection revealed moderate to severe corrosion of the cupped washers. I ordered a brand new set-up which included the bolt, washers, and seals. With boat on the trailer, I put a jack under the keel, slightly relieved the weight, climbed inside and with a large rachet set proceeded to remove the keel pivot bolt assy. The nut and hardware came off of the threaded side just fine but I could not budge the bolt head side. After lots off penatrating fluid and elbow grease I got it to budge. Worked it back forth continuing to spray penetrating fluid from under the boat and after a while it began to rotate in the keel. putting the old nut back on, threaded it flush it with the end of the threads, I took a large sledge and knocked it out. Success!! A quick look with the flashlight showed the hole perfectly aligned to install the new assy. Having 25 years experince as a wrench bender I knew better than to install this dry. I coated all with a thick coat of silicone lube from a tube, this would lubricate the pivot, prevent chaffing of the rubber, and act as a rubber preservative. Also being very slippery stuff it should make the keel operation smooth as butter. It looked like this would be a uneventful 30 min job. Wrong!! With the new assy in place I began to tighten it up. After several easy turns with the rachet the new nut began to tighten up. I looked at the nut and could see the bolt threads were entering the nylon portion of the locking nut and continued to tighten. It suddenly would not turn and there was along way to go yet. I knew I was in trouble. For those who have never experienced stainless to stainless galling count your blessings. It is the same as hiring a welder to weld the nut onto the threads only cheaper. Out comes the grinder, two brand new 4 1/2 in cutting disks and two hours later I finally get the nut off. Thankfully my old keel bolt was in good shape and the old nut was still usable. Used the old bolt and nut with new washers and seals and off we went. A couple of our memorable events - Saw three Black bears feeding on beach grasses, one a mere 20 yards away at a secluded cove anchorage. A huge bald eagle swoop behind the steern to pick up our discarded fish carcass minus the fillets . The eagle then landed 20 yards away on shore and proceded to rip apart and devour. Could see the grain of the eagle's feathers through our binocs. Five days of bliss, no more water seeping around the keel bolt, and by the 6th of july the misery was all a memory.