Loose C27 Shaft Strut - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 4 Days Ago
Senior Member
 
Join Date: Aug 2011
Posts: 177
Thanks: 0
Thanked 7 Times in 7 Posts
Rep Power: 4
engineer_sailor is on a distinguished road
Loose C27 Shaft Strut

Boat is out of the water for the winter. Was doing a quick walk around while pulling sails and such. Noticed glistening of moisture where shaft strut meets the hull. Applied some pressure and sure enough there is a little play/wiggle. Sigh...

Anyone had this issue? If so, is there a recommended fix?

Looks like Catalina uses several methods over the years for strut install including both one without bolts and one with bolts:

http://www.catalinadirect.com/index....structions.cfm

No idea which one my 1985 has. I do see the hump down below but all glass, no exposed bolts. Judging by drawings the lack of taper in my strut leads me to believe it style 2:
Loose C27 Shaft Strut-imageuploadedbytapatalk1416718933.333201.jpg

Option 1: Start from outside hull, expose edges where strut enters hulls. Align, and squirt in epoxy. Could be done without removing shaft

Option 2: Cut open hump and hope for bolts

Option 3: if cut open and no bolts, secure with more epoxy or replace with new bolt version from CD. Worst case. Expensive strut, shaft removal (rudder drop), etc.

The big concern is that if not fixed the side to side play will cause cutlass bearing wear and/or stress on transmission.

Advice? Thoughts? Experiences?

Josh
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 4 Days Ago
Cap-Couillon's Avatar
Noah's Bosun
 
Join Date: Jan 2013
Posts: 132
Thanks: 2
Thanked 19 Times in 17 Posts
Rep Power: 2
Cap-Couillon is on a distinguished road
Re: Loose C27 Shaft Strut

Aww Nuts! At least you have the off season to make the repairs...

You are correct in the need for addressing the issue. Vibration, reduction gear output bearing wear, shaft log gland wear, excessive cutlass bearing wear etc. Plus water intrusion into hull layup at the penetration is not good as well.

Given the last point, the best, (and as always the most time consuming) is to pull the shaft (get it check for straightness while it is out) pull the strut, and clean out the original bedding and overlay, allowing for dry-out time depending on what you find..

The biggest problem (other than the grunt work) will be getting the strut in proper alignment (and keeping it there) during the initial bedding. In the yard, a laser alignment tool is usually the answer. A cheap laser pointer shimmed into the the exact center of the cutlass bearing housing and a paper target mounted on the reduction gear flange can be a big help.

Reading thru the linked pdf, it looks as if the big difference is whether the strut mounting is inside the hull (style 1) or in a pocket on the exterior and thru bolted (style 2 and 3) Bolts are added (drilled after alignment) to style 2 and 3 to assist in transferring the load to the hull laminations, as well as holding strut in place while the install resin cures...

Style 1 will be the easiest to remove depending on access inside the hull. In style 2 and 3, separating the strut from the microballoon resin without delaminating the hull looks like it could be a bear... Although, if the strut is wiggling like a loose tooth, the bond has probably already failed.

All in all a dirty job, but not rocket surgery. If you take your time on removal (don't bust nuthin' new 'cept your knuckles) and make sure the initial alignment is right on the money, it is certainly not beyond a diy level.

Your boat will thank you for doing it right, and so will you down the way.
__________________
"If the wind will not serve, lay to the oars"

Onboard - Solitaire
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mirage 30 - propellor shaft strut Ken Bowering Gear & Maintenance 9 06-03-2013 01:38 AM
Shaft Strut sailorboy2 Gear & Maintenance 4 12-13-2010 09:30 AM
CS36T Loose Prop Shaft Strut imckinnon CS Yachts 0 05-17-2009 12:41 PM
Painting shaft strut sail268 Gear & Maintenance 2 03-27-2007 11:00 PM
Where to get a prop shaft and strut?? john232 Gear & Maintenance 4 01-06-2004 11:26 PM


All times are GMT -4. The time now is 09:45 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.