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I'm not sure if this will help, but here's a great propeller shaft bearing calculator that will give you an idea of how many cutless bearings you should have based on ABYC construction standards. As far as a reliable shaft seal that's designed to withstand extreme environments and use, check...

We have a downeast style lobster boat (Calvin Beal) single diesel inboard engine. These self aligning seals are standard equipment on these types of boats that get 1500 to 2000 hours per year (not ours, but the boats used as commercial fishing boats). With the water feed, you’re able to tighten...

Like others have said, PSS (or similar mechanical seals) work well if properly installed and properly maintained. The problem is there's a few things that can go wrong with them. The bellow can loose compression (causing a bad leak), the rotating face plate can slide forward on the shaft...

We see these stainless and bronze shaft tubes a lot on Canadian fishing boats (our shop is in Maine). As others have mentioned, the preferred remedy is to replace it with a custom fiberglass shaft tube fitted with cutless bearings (water bearings). We'll then "barb" the forward end of the...

The PSS are fine if you (or your mechanic) stays on top of the maintenance and visually inspects them frequently. Most of the commercial guys here and Maine have gone to the RE Thomas ISB/SA self-aligning shaft seal for the failures mentioned above. It's a traditional bronze stuffing box...

You might want to consider one of the RE Thomas self aligning shaft seals. They combine the "dripless" benefits of a PYI PSS or Tides Shaft seal with the proven reliability of a traditional bronze stuffing boxe. These shaft seals are very popular on commercial and higher horsepower...

I'm surprised California Maritime doesn't at least give partial credit for an AA degree. I know Maine Maritime Academy does. That might be an option and it is a fantastic school with all kinds of marine related opportunities. However, it is in Maine during the winter so there's that too...

Dixon and Trident are two of the brands we've used for SS hose clamps. You can find them on Amazon on your local hydraulics supply store (assuming you have one).