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10-22-2017, 05:36 PM
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#1
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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What's this on my shaft?
Getting ready to remove this shaft to have it trued up or replaced. I've never seen the thing that's between coupling and the packing gland. I was going to remove it and I don't know if I should be anal about it's location, take measurements or what?
Thanks
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10-22-2017, 05:55 PM
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#2
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Guru
City: Thibodaux, Louisiana
Vessel Name: Gumbo
Vessel Model: 2003 Monk 36
Join Date: Oct 2007
Posts: 3,882
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The only thing I can think of is it may be a way (a stop) to keep the shaft from slipping too far back, maybe hitting the rudder, if it ever came loose at the coupling???
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10-22-2017, 05:59 PM
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#3
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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I was really tentative opening this thread...
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10-22-2017, 06:06 PM
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#4
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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I wondered the same thing Steve. Also wondered if it was something to break a standing wave node, since it's only an 1 1/4" shaft. I'm sure someone on TF will know for sure.
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10-22-2017, 06:31 PM
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#5
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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Do you have a get-home set up now (or previously) where this could have been part of the connector?
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10-22-2017, 06:47 PM
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#6
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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Menzies, There's one on the other shaft too. I'm not aware of any "get home" setup. Bought the boat this past January. I wondered about it but didn't really give it much thought until I went to remove it.
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10-22-2017, 07:07 PM
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#7
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Guru
City: Powell River, BC
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 3,971
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That appears to be a jewelry remover. Results may vary.
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10-22-2017, 07:21 PM
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#8
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Guru
City: Thibodaux, Louisiana
Vessel Name: Gumbo
Vessel Model: 2003 Monk 36
Join Date: Oct 2007
Posts: 3,882
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If you wear a tie in the engine room keep well clear of it while it is spinning.
Seriously any clothing, rings, or other items could get caught in it.
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10-22-2017, 07:34 PM
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#9
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Senior Member
City: Alexander
Join Date: Aug 2017
Posts: 152
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Used to keep the shaft in the boat in case of catastrophic coupling failure.
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10-22-2017, 07:49 PM
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#10
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 12,923
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Quote:
Originally Posted by menzies
I was really tentative opening this thread...
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Me too. First thought was penicillin. 
It could be to lock the shaft when running on the other engine,removing any risk to the gearbox.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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10-22-2017, 07:52 PM
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#11
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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Quote:
Originally Posted by Tink
Menzies, There's one on the other shaft too. I'm not aware of any "get home" setup. Bought the boat this past January. I wondered about it but didn't really give it much thought until I went to remove it.
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Ah, twins, then probably no get home.
I think the lock when running a single prop is a good suggestion.
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10-22-2017, 08:12 PM
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#12
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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You guys have your minds in the gutter  . Thanks for the thoughts. Guess I won't worry too much about it. Should I leave them off when I reinstall the shaft so I don't lose a limb, or worse?
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10-22-2017, 08:44 PM
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#13
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 12,923
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Quote:
Originally Posted by Tink
Should I leave them off when I reinstall the shaft so I don't lose a limb, or worse?
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If I`m right that it`s to secure one shaft and gearbox when running on the other engine alone, and you might do that, then reinstall them. Some people run on one for economy. The only question I would have is do they affect the balance of the shaft, but the shaft is so heavy it`s hard to imagine that being an issue.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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10-22-2017, 09:11 PM
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#14
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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I don't plan run on one engine unless one engine quits. If its to secure the shaft, I must have some parts missing. I've scoured the internet looking for a shaft stop and don't see anything like it. I dunno.
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10-22-2017, 09:19 PM
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#15
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Guru
City: Hotel, CA
Join Date: Sep 2011
Posts: 8,323
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Tough to tell but could possibly be some Bakersfield engineered shaft balancing attempt. How long have you owned the boat?
__________________
Craig
It's easier to fool people than to convince them that they've been fooled - Mark Twain
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10-23-2017, 12:02 AM
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#16
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Veteran Member
City: Ashland City, TN
Vessel Name: Tinker Belle
Vessel Model: 1973 Gulfstar 43 Trawler
Join Date: Jul 2017
Posts: 68
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Bought the boat in January, 2017.
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10-23-2017, 03:44 AM
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#17
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Guru
City: Beverly Hills
Join Date: Feb 2012
Posts: 1,371
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I would remove and replace with shaft donut zinc. Placement based on distance to rudders in case couplings failed. Also From photo unable to tell what the devise is made of but once removed check for crevise corrosion.
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10-23-2017, 06:57 AM
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#18
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116 2008
Join Date: Oct 2017
Posts: 10,292
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Take approx measurements, write them down.
I am reasonable sure you will see, on the shaft where is was located but just in case ....
__________________
The meek will inherit the earth but, the brave will inherit the seas.
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10-23-2017, 08:18 AM
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#19
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TF Site Team
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
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Looks like s split collar to keep shaft from coming out to far . Maybe had that problem before and just added these after .
__________________
Marty
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10-23-2017, 10:06 AM
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#20
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Guru
City: Palm Coast, FL
Vessel Name: Coquina
Vessel Model: Lagoon 380
Join Date: Jan 2017
Posts: 2,506
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Quote:
Originally Posted by Pack Mule
Looks like s split collar to keep shaft from coming out to far . Maybe had that problem before and just added these after .
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Agree; But, I don't think the tranny coupler will let loose very easy, from the looks of things. At least there is lots of room to move the shaft back and demolish the correct item.
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