Here are my 2˘;
I suspect that when Tubsmacker experienced the original problem that several things that may have happened;
- the broken motor mounts may have caused (or been caused by) the prop shaft to become untrue (bent).
- a bent prop shaft will have caused the stuffing box to chafe the stern tube so that it may now be tapered.
- tightening the hose clamps with a tapered stern tube will push the stuffing box hose forward.
- if the shaft is still untrue, this will also contribute to the stuffing box hose moving forward.
- If there is any grease present on the stern tube, it would exacerbate the slippage.
I advise looking closely at the shaft while the boat is hauled, and be prepared to replace it. I would also look closely at the stern tube (shaft log), and be prepared with epoxy and cloth to effect a repair here.
While the boat is hauled, I would also take this opportunity to add a bilge pump, and the requisite plumbing, which is hard wired
to the largest of your battery banks.