The outdrives seem to have missed the final part of machining, i.e they get machined to a size, hard anodized then the bearing seats should see a post anodizing re-surface to ensure the correct fit.
Cracked driveshaft, at a guess, that has happened when the pin has been pressed into place with either a) to small a hole or, b) driveshaft not sufficiently heated to expand the hole prior to pin fitment.
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