I wonder if they were the older, original style that didn't have the water vent tube. I believe you are supposed to 'Burp' the seal upon launch, to get the air out. I have never done this, and never had any problem. I would think you would have to really be spinning the shaft pretty fast to overheat one of those to get them to crack and fail. I wonder if there were other things at play to have caused that. Just looked at the Lasdrop Shaft seals, and they look intriguing. There are 3 styles, and they look to be geared toward power boats. I wonder which one is recommended for sailboats.
Bill Coleman C&C 39 Erie, PA -----Original Message----- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Steve Thomas via CnC-List Sent: Saturday, October 20, 2018 7:41 AM To: cnc-list@cnc-list.com Cc: Steve Thomas Subject: Re: Stus-List C&C 33-2: PYI shaft seal I don't know if this is brand-specific, or which brands were involved, but while I had my boat hauled out and was in the process of making a decision on what to do about the packing gland on my boat, 2 boats in the same marina had serious leaks due to broken graphite parts in their dripless packings. One of them sank and the other managed to get hauled out in time. I did not know that such a catastrophic and sudden failure mode even existed up til then. No vendor or manufacturer's literature that I had seen even mentioned such a possibility. How such an event could be handled at sea I did not know. Anyway, it freaked me out and I decided to install a new conventional packing gland instead. Steve Thomas C&C27 MKIII - Ontario C&C36 - Florida _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
