Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 16-07-2020, 10:26   #1
Registered User

Join Date: May 2012
Location: Florida coast and Bahamas
Boat: Bristol 45.5
Posts: 11
Need shaft alignment near Titusville FL.

Nalani, is a 1980 Bristol 45.5 Ketch with Yanmar power.
I'm the owner for three years and have shaft vibration that limits my revs to about 2000.
I'm looking for a competent yard near Titusville or Ft. Pierce to rebed engine mounts, align shaft and replace cutlass bearing.
Hoping for real life experiences and recommendations from the fleet.
Cheers.
Thebaysailor is offline   Reply With Quote
Old 16-07-2020, 10:34   #2
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 22,901
Re: Need shaft alignment near Titusville FL.

I have not experienced alignment so bad it would limit the rpm like that. I wonder if you have a bent prop or something?
At any rate, it's been too long since I was in the yard in that area to be of any help. There was a boat mechanic under the name of Tim's Marine there years ago. If he's still around, he's a good guy and may have a suggestion. The Yanmar parts guy in the little house just North of N. Beach Causeway on Old Dixie Hiway knows him.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Old 16-07-2020, 11:50   #3
Registered User

Join Date: May 2012
Location: Florida coast and Bahamas
Boat: Bristol 45.5
Posts: 11
Re: Need shaft alignment near Titusville FL.

There had been done poor work done, new shaft, new mid shaft bedded bearing, the year before I purchased her.
I found that the engine mounts were loose on the wood stringers and would not tighten as the wood holes were tired, 38 year old boat.
Prop is Max Prop and gets serviced before each launch.
Thebaysailor is offline   Reply With Quote
Old 02-08-2020, 02:52   #4
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 758
Images: 10
Re: Need shaft alignment near Titusville FL.

Is she a center cockpit?
I had a very similar problem and spent 4 years looking for the answer.
My boat is a 40f centre cockpit. With a long prop shaft. Long, expensive story but the solution was to get rid of my old stern gland which had some sort of loose cutlass bearing in it. This was the source of a nocking noise and also made it near impossible to centre the Shaft in the stern tube. Which made it very difficult to get an accurate alignment.
Next. Get a rubber cutlass bearing and glue it onto the forward end of the stern tube. Install new dripless seal. Align.. and your good to go.
Regarding alignment. Do it yourself. Had professional's align mine 3 times. None of them got the prop centered in the stern tube or twigged to the real sorce of the problem. Waist of time and money. It's not hard it's just a question of you putting as much time as you need into it.
I will post a link my massive thread on this. Skip to the end for what fixed it.
__________________
Drinking hot tea on a hot day is like banging your head against a wall . It feels good when you stop.... "Terry" my dad.
Hoohaa is offline   Reply With Quote
Old 02-08-2020, 02:58   #5
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 758
Images: 10
Re: Need shaft alignment near Titusville FL.

https://www.cruisersforum.com/forums...d.php?t=174478


Vibrating shaft at slightly high revs.
__________________
Drinking hot tea on a hot day is like banging your head against a wall . It feels good when you stop.... "Terry" my dad.
Hoohaa is offline   Reply With Quote
Old 02-08-2020, 03:37   #6
Registered User

Join Date: May 2012
Location: Florida coast and Bahamas
Boat: Bristol 45.5
Posts: 11
Re: Need shaft alignment near Titusville FL.

Thanks Hoohaa,

She is a CC and yes, longish shaft. I suspected the mid bearing was a contributing factor as it was added and not part of the original design.
I'll check your link and quiz you more if needed.
Thebaysailor is offline   Reply With Quote
Old 02-08-2020, 04:34   #7
Registered User
 
sanibel sailor's Avatar

Join Date: Feb 2013
Location: Ocala FL
Boat: 1979 Bristol 35.5 CB
Posts: 1,693
Re: Need shaft alignment near Titusville FL.

also check prop size. If not enough tip clearance, it can cause vibration. I think 15% is minimum recomended. Someone might have thought bigger is better.
__________________
John Churchill Ocala, FL
NURDLE, 1979 Bristol 35.5 CB
Homeport currently Yankeetown FL
sanibel sailor is offline   Reply With Quote
Old 02-08-2020, 06:20   #8
Registered User
 
Andreas W's Avatar

Join Date: Jun 2020
Location: Rügen, Germany
Boat: last boat: 2008 Dix 43 CC, steel, 43 ft
Posts: 55
Images: 2
Send a message via Skype™ to Andreas W
Re: Need shaft alignment near Titusville FL.

Good advice. I had a 43 ft CC boat with a 54 hp Yanmar.
I used a stern tube with 2 cutlass bearings made of Vesconite on both sides, and a dripless PSS seal.
Vesconite is better than rubber because it has a lower friction, and it does not swell up. Just make sure to machine 2 spiral grooves per bearing to ensure sufficient water flow.

Quote:
Originally Posted by Hoohaa View Post
Is she a center cockpit?
I had a very similar problem and spent 4 years looking for the answer.
My boat is a 40f centre cockpit. With a long prop shaft. Long, expensive story but the solution was to get rid of my old stern gland which had some sort of loose cutlass bearing in it. This was the source of a nocking noise and also made it near impossible to centre the Shaft in the stern tube. Which made it very difficult to get an accurate alignment.
Next. Get a rubber cutlass bearing and glue it onto the forward end of the stern tube. Install new dripless seal. Align.. and your good to go.
Regarding alignment. Do it yourself. Had professional's align mine 3 times. None of them got the prop centered in the stern tube or twigged to the real sorce of the problem. Waist of time and money. It's not hard it's just a question of you putting as much time as you need into it.
I will post a link my massive thread on this. Skip to the end for what fixed it.
__________________
'How inappropriate to call this planet Earth when it is quite clearly Ocean.' - Sir Arthur C. Clarke
Andreas W is offline   Reply With Quote
Reply

Tags
men

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need shaft alignment noel32129 Engines and Propulsion Systems 5 11-06-2013 15:18
For Sale: Avon Redstart Inflatable in Titusville, FL RexR Classifieds Archive 2 06-08-2011 09:21
Strut, Shaft, Shaft Log, Engine Alignment KestrelBuck Engines and Propulsion Systems 24 03-04-2011 23:14
Need New Bimina - Titusville rleslie Construction, Maintenance & Refit 3 16-11-2007 18:43

Advertise Here


All times are GMT -7. The time now is 14:33.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.