Transmission to Shaft Coupler Adapter? - SailNet Community
LinkBack Thread Tools
post #1 of 3 Old 03-31-2010 Thread Starter
Junior Member
Join Date: Mar 2010
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Transmission to Shaft Coupler Adapter?

I have a Hurth 250 transmission, with a 4" drive output (Warner pattern; 4 bolts).

The maximum size prop shaft that can be used in a 4" flange coupler is 1 1/2". I have a 1 3/4" prop shaft, which requires a 5" flange.

I need a coupler adapter that will connect the 4" flange on the transmission to the 5" flange shaft coupler.

Anyone know where I can get one?

Thanks in advance for your help.
reka30 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 3 Old 03-31-2010
Senior Member
Join Date: Jul 2008
Location: chesapeake bay
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
you could go to a machine shop and have one made, the only issue would be shaft length. the adapter might be as short as 1 inch, but probably more. the best bet would be to have a custom coupler made for the shaft that takes the larger shaft with the smaller bolt pattern.

cost at least a few hundred, and i would have 2 made so you have a spare. the cost for the second would be cheaper as they would have the setup ready.
scottyt is offline  
Quote Quick Reply Share with Facebook
post #3 of 3 Old 03-31-2010
Senior Member
Maine Sail's Avatar
Join Date: Jan 2003
Location: Maine Coast
Posts: 6,428
Thanks: 22
Thanked 310 Times in 240 Posts
Rep Power: 18
I've never seen one or heard of one. Most shafting shops and boat builders try to stay within standard ranges/sizes. A machine shop will likely be your best bet for this adapter just be sure it is machined well and has no run out between faces which could add negatively to any alignment issues. You want this adapter to be "invisible" run out wise. It would be best to get the adapter faced (machined straight) while bolted to the shaft coupling. Of course this requires that the shaft is out of the boat...

-Maine Sail / CS-36T

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Images In Posts Property of Compass Marine Inc.

Maine Sail is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
transmission question almostbroke Gear & Maintenance 10 09-17-2012 09:56 AM
Drive Train Vibration Tom Wood Gear and Maintenance Articles 0 10-10-2002 08:00 PM
Breakdown in Paradise Mark Matthews Gear and Maintenance Articles 0 04-29-2002 08:00 PM
prop shaft coupler thurston Gear & Maintenance 2 12-31-2001 06:00 AM
The Stuffing Box and Stern Tube Tom Wood Gear and Maintenance Articles 0 04-27-1999 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome