I'm afraid that's not the Droid you're looking for -
On the bright side, this is happening over the winter, so you're going to
have plenty of time to figure this out.
There should be plenty of machine shops in your area, I would suggest you
take that nut around and get a price for it, assuming the threads on the
shaft are okay. Just A tap to cut the threads on a new nut is 180 bucks- a
good machine shop can cut those in with a cutter they have.
A friend who also crewed with us bought a 37 like yours. One day he backed
out of his slip and it wouldn't go into forward, and he ended up on the rip
rap. His insurance bought him a new rudder, I think from South Shore. He
offered me his Bent one, and oddly I didn't take it, or I would still have
it like everything else and I I could tell you what you need.

Bill Coleman

On Sat, Dec 9, 2023, 15:05 Chris Riedinger via CnC-List <
cnc-list@cnc-list.com> wrote:

> https://www.mcmaster.com/products/shaft-collars/
>
> They're called shaft collars
>
> On Sat, Dec 9, 2023, 10:03 AM Dave S via CnC-List <cnc-list@cnc-list.com>
> wrote:
>
>> Or drill and tap the same collar, rotating the holes?
>> Or re-drill  the same holes and tap and use a larger screw?
>> Dave ex-33-2 windstar
>>
>> Sent from my iPhone
>>
>> On Dec 9, 2023, at 12:56 PM, David Risch via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>> 
>>
>> Richard…I am sure a competent machine shop can replicate?
>>
>>
>>
>> *From:* Matthew Wolford via CnC-List <cnc-list@cnc-list.com>
>> *Sent:* Saturday, December 9, 2023 9:52 AM
>> *To:* Stus-List <cnc-list@cnc-list.com>
>> *Cc:* virb...@cogeco.ca; Matthew Wolford <wolf...@erie.net>
>> *Subject:* Stus-List Re: C&C 37 Rudder post assembly
>>
>>
>>
>> I suggest starting there.  If Rob doesn’t have one, he may be able to
>> suggest an alternate source.
>>
>>
>>
>> Sent from my iPhone
>>
>>
>>
>> On Dec 9, 2023, at 9:47 AM, Barry McKee via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>> 
>>
>> Yes they are.
>>
>>
>>
>> Barry McKee
>>
>>
>>
>> C&C 29 “Discovery II”
>>
>> Bronte, ON
>>
>>
>>
>> *From:* Matthew Wolford via CnC-List [mailto:cnc-list@cnc-list.com
>> <cnc-list@cnc-list.com>]
>> *Sent:* 9-Dec-23 8:24 AM
>> *To:* Richard Bush
>> *Cc:* Stus-List; Matthew Wolford
>> *Subject:* Stus-List Re: C&C 37 Rudder post assembly
>>
>>
>>
>> Is South Shore Yachts still in business?
>>
>>
>>
>> Sent from my iPhone
>>
>>
>>
>>
>> On Dec 8, 2023, at 3:00 PM, Richard Bush <bushma...@aol.com> wrote:
>>
>> 
>>
>> Hi all; Bill is the winner for long distance diagnosing...; there is  a
>> chrome "collar" or "nut' which is threaded and the the top of the rudder
>> post which is also threaded; the collar is tightened down over the rudder
>> post and sits on a delrin "washer" which is about 1/8 inch thick. There are
>> two set screws in the collar to keep it tight n the rudder post.  The
>> rudder pivots on this assembly when steering the boat.
>>
>>
>>
>> In my case, these set screws apparently loosened up to allow the collar
>> to loosen which caused play in the rudder post. The result was to strip the
>> threads on the collar allowing the rudder to drop.  The fix is to get a new
>> collar, which I hope someone here can help my in identifying; there are no
>> markings or part numbers on the collar. Of course, I have lots of photos.
>>
>>
>>
>> For a quick fix, we were able to invert the collar and use the remaining
>> threads ( about 1/2" to 5/8") to hold the rudder in place. I am confident
>> that this will work until I can identify and order the new collar.
>>
>>
>>
>> So it seems I have been lucky and my situation fits under Mike Hoyt's
>> "good case" scenario rather than the whole assembly failing, which is the
>> "bad case" scenario.   I feel a lot better than I did 24 hours ago, but
>> will report back on progress.  I would have thought the C&C used the same
>> assembly for all of the rudders regardless of the model of the boat, but
>> maybe not...;
>>
>>
>>
>> If anyone ha any experience or suggestions in locating the "collar,
>> please send them on...Thank you to everyone!
>>
>>
>>
>> Richard
>>
>> Richard N. Bush Law Offices
>>
>> 2950 Breckenridge Lane, Suite Nine
>>
>> Louisville, Kentucky 40220
>>
>> (502) 584-7255
>>
>>
>>
>>
>>
>> On Thursday, December 7, 2023 at 03:37:58 PM EST, Bill Coleman via
>> CnC-List <cnc-list@cnc-list.com> wrote:
>>
>>
>>
>>
>>
>> I thought there was a nut on the top of the post. If so, it may have come
>> off and it slipped down till the quadrant hit the hull. Obviously you are
>> going to have to go down an look, and all things shall be revealed unto you
>>
>>
>>
>> Bill Coleman
>>
>> Erie PA
>>
>>
>>
>>
>>
>> On Thu, Dec 7, 2023 at 3:15 PM Richard Bush via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>
>>
>> Hi all; I am in need the collective wisdom of the group for a rudder
>> issue; my boat (1985 C&C 37 CB) has been sitting on a trailer since early
>> September for repairs to the hull, not rudder related; sometime in the past
>> week the rudder has dropped a full two plus inches and no one knows how
>> this happened; the hull  has been painted and the painters said they moved
>> the rudder by moving the steering wheel and had no issues;  does anyone
>> have any ideas or suggests about what could have occurred? and more
>> importantly, what needs to be done to make the rudder usable?
>>
>>
>>
>>
>>
>> We were hoping to relaunch in the next week or so...I'll be happy to
>> provide more information if anyone has questions...Thanks!
>>
>>
>>
>> Richard
>>
>> 1985 C&C 37 CB; Ohio River...
>>
>>
>>
>>
>>
>> Richard N. Bush Law Offices
>>
>> 2950 Breckenridge Lane, Suite Nine
>>
>> Louisville, Kentucky 40220
>>
>> (502) 584-7255
>>
>> Please show your appreciation for this list and the Photo Album site and
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>> Thanks for your help.
>> Stu
>>
>> Please show your appreciation for this list and the Photo Album site and
>> help me pay the associated bills.  Make a contribution at:
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>> Thanks for your help.
>> Stu
>>
>> Please show your appreciation for this list and the Photo Album site and
>> help me pay the associated bills.  Make a contribution at:
>> https://www.paypal.me/stumurray
>> Thanks for your help.
>> Stu
>>
>> Please show your appreciation for this list and the Photo Album site and
>> help me pay the associated bills.  Make a contribution at:
>> https://www.paypal.me/stumurray
>> Thanks for your help.
>> Stu
>>
>> Please show your appreciation for this list and the Photo Album site and
>> help me pay the associated bills.  Make a contribution at:
>> https://www.paypal.me/stumurray
>> Thanks for your help.
>> Stu
>
> Please show your appreciation for this list and the Photo Album site and
> help me pay the associated bills.  Make a contribution at:
> https://www.paypal.me/stumurray
> Thanks for your help.
> Stu
Please show your appreciation for this list and the Photo Album site and help 
me pay the associated bills.  Make a contribution at:
https://www.paypal.me/stumurray
Thanks for your help.
Stu

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