Discovered something disappointing (and a bit angering) tonight while running the boat on the muffs to do some tuning -- the drive bellows that I just put on the boat at the end of last year have large cracks in them! I'm guessing the eBay seller I bought them from sold me new old stock from 30 years ago that was silently rotting on the shelf. The bellows I replaced didn't look like this. Granted, these looked fine when I installed them, but they disintegrated after just one trip. Dammit. The exhaust bellows seem to be fine though. They were ordered at the same time, but maybe not the same place.
If it's not one thing, it's another. I guess I'll look at the old ones and see if I can get the rest of this season from them.