Brad, If you are planning on a typical PNW San Juan's and further north summer cruise you will be putting many hours on your auxiliary engine. (Summer in the San Juan's turns sailboats into slow power boats.) Performing the full shaft/coupling repair now would be a good idea.
If you plan on a short motor out of the marina and then shutting down the mechanical propulsion you may be able to fit a larger woodruff key, larger set screws/bolts, and follow the other advice regarding placing a zinc forward of the shaft log in case the low budget repair fails. If the coupling remains loose on the shaft expect additional vibration and wear on both the shaft and coupling plus a clunk when shifting between forward and reverse. If you do go the "full monte" and pull the shaft, take a close look at your cutlass bearing as it would be easy to replace at the same time. Martin DeYoung Calypso 1971 C&C 43 Seattle [Description: Description: cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F] From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Brad Crawford via CnC-List Sent: Friday, June 05, 2015 11:16 AM To: cnc-list@cnc-list.com Cc: Brad Crawford Subject: Stus-List Propeller Shaft Coupling question 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
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