Maybe I don't understand this - but are you saying the hose clamp is holding 2 pieces of the driveshaft together???Well, I noticed some drips from my hydro on my 1250 this summer. Thought maybe I had over filled it but checked and it was at an ok level. I had removed the hydro about a year earlier to replace the cork gasket and was afraid it was leaking again…Then I noticed that the plastic fan which I had replaced fairly recently was down to one blade. I got a new one from Charlie, (thanks for the candies too). Was not feeling enthusiastic about removing the drive shaft so I tried cutting it in “half” at the hub and holding it on with a hose clamp. Took a bit of fiddling but it worked, and I see no leaks now… so I either had over filled it or the fan helps. I think the engineers knew what they were doing, yes these machines are massively overbuilt by today’s standards but that’s why we love em. So maybe think of the fan as part of the overbuilding… happy thanksgiving all.
If so, I don't see how it would last with the torque you get from these Kohler K engines.