Know of 2 boats here is Anacortes that had the s/s shaft tubes rust out. On one the owner busted out all the concrete to get to it and replaced it with a fiberglass tube. On the other one they managed to pull the tube out of the concrete, it took them a couple of days of fooling around but they finally got it out. They had to make a thin wall fiberglass tube to replace it, since it had to fit the existing hole. Neither job looked like any fun.
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