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I read a post or two in the past about the failure of a dripless shaft seal. I was surprised to read of such failures as I've always believed these devices to be highly reliable.
I just bought a boat and can tell you first hand of a failure, well a failure in the making. It should be standard practice to keep everything well clear of the shaft seal. On my boat, a 2" manual bilge hose and several other drip lines were routed near the shaft seal. The 2" hose, being somewhat inflexible exerted some minor force on the shaft seal near the shaft tube. The pressure was enough to cause the shaft seal bellows to rub on the shaft and wear a small hole in the shaft seal bellows. BTW, it's probably important to note that I don't know if the hoses were ran this way by the manufacturer or the last owner.
Here's a shame on me and some of you warned me. I used a surveyor recommended by the broker that was registered or accredited or whatever they do for one of the two surveyor societies. He was not very good. I had to point out a couple of things to him and he dismissed the drip in the bilge to AC condensation. Thankfully I was doing a full servicing and inspection myself before starting a lengthy cruise. Had he discovered the problem I could have a voided a second pulling of the boat in just two weeks. If anyone is considering a surveyor in the Houston area I can tell you off line who I would not use.
Gil
Nordhavn 35
"Dog's Life"
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