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KENO 
Grand Poobah 
Joined: June-06-2004 Location: United States Status: Offline Points: 11155 |
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 Posted: December-11-2020 at 3:55pm |
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Maybe your friends shaft is still together because they solved their problem in the last year or two and a lapping job did nothing to prevent breakage. That many broken shafts on one boat must be a record, I think CC would have wanted that boat back to do a little root cause analysis. Just think of all the money and resources expended over the years by a bunch of engineers at CC, Acme and various shaft suppliers and who knows who else................and all they had to do was listen to Pete and do a little lapping. They should all be fired
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8122pbrainard
Grand Poobah
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: December-12-2020 at 5:06am |
Yes, I understand the keyway position was determined to be a problem. My friends last shaft broke after the change was made. It was clear that the forward area of the prop/shaft taper wasn't seated. The material removed for keyways causes a weak spot and also stress in the area. It would be interesting to know if they ever considered not machining the keyway in the shaft at all?
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Gary S wrote: