Owner since 2006 of a Sun Fast 40 of 2002, I have to remake the funds, structure and varangages, because rotten and weakened. The bottoms became so soft that the keel could be moved and the last rear stud broke. Have you been aware of this type of problem on these boat series (Sun Odyssey an Sun Fast 40) ?
Hi Joel, about 10 years ago a friend of mine bought a brand new Sun Fast 37. This was to become his retirement boat. After a while he noticed that when his boat was hanging in the slings of the travel lift, he could swing the keel sideways without the hull moving at all. A survey found that the laminate in the keel area was way too thin. As the hull was still under warranty, the then importers of Jeanneau in the Netherlands were asked to do the necessary repairs. Initially they refused to take any responsibility, but after some legal threatening they made a structural repair - more than doubling the laminate in the keel area. My friend was so sick of this that he sold his boat and has given up the sport. Sad story, but then you asked.
Our 2000 SO40 has the deep keel and has shown no problems, but it has always been a fresh water boat (Great Lakes). I have not seen any distortion of the hull-keel joint when the boat has been set for winter storage or lifted up for springtime launch, with blocks under the keel and jackstands holding the hull in the yard. Nor have I felt any softness when painting the bottom of the keel with the boat in the lift slings. The prior owned did have a hard grounding once and there was a crack in the forward stringer that we had repaired when we bought the boat in 2012. It is true that the hull is not very thick, but the stringers around the keep appear strong and stable. The keel bolts are checked regularly and everything remains tight.