Well looks like PSS finally listened to Compass Marine: http://www.pbase.com/mainecruising/pss_shaft_seal
The point being I expect the shaft collar he uses is orders of magnitude cheaper than the one PSS supplies. I would consider relying on zincs and retention rings .... and just the worn key ... to secure the shaft together to be a temporary measure only. You know it’s going to shear at the worst possible moment! Peter Fell Sidney, BC Cygnet C&C 27 MkIII From: Marek Dziedzic via CnC-List Sent: Friday, June 05, 2015 7:46 PM To: cnc-list@cnc-list.com Cc: Marek Dziedzic Subject: Re: Stus-List Propeller Shaft Coupling question You can always put a retention ring (http://www.pyiinc.com/index.php?section=src ) on the inside (between the coupling and the packing gland). Much better than the zinc. Marek From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Brad Crawford via CnC-List Sent: June-05-15 14:48 To: 'Brent Driedger'; cnc-list@cnc-list.com Cc: Brad Crawford Subject: Re: Stus-List Propeller Shaft Coupling question Yes I have the same feelings. I also have zincs on the shaft in front of the strut, I guess it eases the feeling of losing the shaft, provided the zinc stays put? Thanks, Brad From: Brent Driedger [mailto:bren...@highspeedcrow.ca] Sent: Friday, June 5, 2015 11:35 AM To: cnc-list@cnc-list.com Cc: Brad Crawford Subject: Re: Stus-List Propeller Shaft Coupling question I have been dealing with exactly that issue since I bought my boat 7 years ago. It hasn't been an issue and as a backup I have a zinc anode on the shaft about 3/8" from the packing nut just in case it lets loose. I'm sure the keyway is wearing out as a result but I haven't noticed any increase in play. It's just on my mind as one of those " not quite right" things Brent 27-5 Lake Winnipeg Sent from my iPhone On Jun 5, 2015, at 1:16 PM, Brad Crawford via CnC-List <cnc-list@cnc-list.com> wrote: I recently had my transmission out for a rebuild and upon putting it back in and the boat back together discovered that the propeller shaft coupling is a little loose on the shaft, maybe 1/8” of rotational movement on the shaft, like possibly the keyway is worn?. Have tried tightening the set screws, which secures the coupling but eventually they work loose and again there is movement of the coupling on the shaft. It’s been recommended that I have the boat hauled, the coupling removed, the shaft pulled out and provided the shaft is ok, a new coupling fitted and faced to the shaft, and then reinstalled for a final alignment. My question to the group is has anyone else been running around with a loose coupling and is this something I should be immediately concerned about? Thanks, Brad Crawford CnC 36 Seattle _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com -------------------------------------------------------------------------------- _______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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