Shaft Log Leak (Pics) - 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 04-27-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
Shaft Log Leak (Pics)

I posted this at the end of the other post about another members shaft log leak but I realized I might be hi-jacking his thread so figured I would just start a new one.

Boat just went in a few weeks ago and just this past weekend as I was playing around with the stuffing box I noticed a small leak coming from the platform the muffler is screwed onto. It only leaks when the engine is in gear and at cruising RPM and it sprays a very small amount of water from a small pin sized hole. The muffler seems to sit on a raised platform of fiberglass ontop the solid fiberglass of the hull so that the screws don't screw into the hole. It is inbetween these two layers that I notice the leak. At first I thought it might be the muffler but I took it out and it is dry. Also it does not leak at all unless this boat is cranking under power so I think it could be the shaft log leaking.

Also as you can see from the 2nd pic, the boat does not have an external shaft strut - the shaft just comes right out of them hull.

Is this something that is a major problem? Should the boat be hauled or is this something that can wait till end of season? Is this type of thing normal?

[IMG]Photobucket[/IMG]

[IMG]Photobucket[/IMG]

Also what is surrounding the shaft log? Meaning in the part of the boat you can't see from the prop to where it enters the cabin near the stuffing box? Is it hollow? is it fiberglass? I'm trying to figure out that if water is getting outside the shaft log, what it might be damaging

Thanks
Nick
__________________
Morgan 323
Reply With Quote Share with Facebook
  #2  
Old 04-27-2009
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,154
Thanks: 2
Thanked 26 Times in 26 Posts
Rep Power: 10
erps will become famous soon enough erps will become famous soon enough
Leaks through layers of laminate scare the be-jesus out me. Wonder if it's freeze damage? I think it's going to take a fiberglass guy to look at it. Maybe they can haul it out, drill bazillions of holes into the area, dry it out and then squirt all sorts of epoxy resin into that area and that would just be a patch.
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


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


Boating for over 25 years, some of them successfully.
Reply With Quote Share with Facebook
  #3  
Old 04-27-2009
Senior Member
 
Join Date: Aug 2006
Location: wherever
Posts: 5,262
Thanks: 8
Thanked 17 Times in 16 Posts
Rep Power: 11
xort has a spectacular aura about xort has a spectacular aura about xort has a spectacular aura about
NK

Hard to tell from the pic, where is the water coming from? the shaft log? Or from the fiberglass below? Is the water clear sea water? Or is it oily, sticky?
Reply With Quote Share with Facebook
  #4  
Old 04-27-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
It seamed to be clear but it is such a small amount that I am not sure. Also I took off the muffler which was screwed in with four 1 inch long screws and the whole area seemed to be solid and no water was seen in or around the screw holes. The only reason I am thinking it is the shaft log is because where else would the water be coming from? Also it only happens when the boat is in gear at cruising rpms/speed.
__________________
Morgan 323
Reply With Quote Share with Facebook
  #5  
Old 04-27-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
Also what do you think is in that raised platform that the muffler is screwed onto and the shaft log enters? Do you think it is hollow? Would it make sense to drill a tiny hole into the front facing triangle to see if water really is getting in there?
__________________
Morgan 323
Reply With Quote Share with Facebook
  #6  
Old 04-28-2009
KeelHaulin's Avatar
STARBOARD!!
 
Join Date: Mar 2006
Posts: 1,662
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
KeelHaulin will become famous soon enough KeelHaulin will become famous soon enough
It could be that this type of installation requires a weep hole to allow water in to the cutless bearing and shaft seal. If there is no way for air to escape then the cutless and shaft seal could get an air pocket trapped in and remain dry which would increase friction and cause heat damage.
Reply With Quote Share with Facebook
  #7  
Old 04-28-2009
capn_dave's Avatar
Seinor Member
 
Join Date: Feb 2000
Location: Green Cove Springs, FL
Posts: 276
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 15
capn_dave is on a distinguished road
Are You Sure

the shaft log is leaking? Water cannot run uphill. I really would suspect the muffler. You say it only leaks at crusing rpm and then a fine mist? It also could be water flying off the packing gland when under power.
I would check the muffler again under power.

Fair Winds

Dave
Reply With Quote Share with Facebook
  #8  
Old 04-28-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
water can run uphill, via capillary action. That's how trees get water from their roots... and it can go a long, long way uphill.
Quote:
Originally Posted by capn_dave View Post
the shaft log is leaking? Water cannot run uphill. I really would suspect the muffler. You say it only leaks at crusing rpm and then a fine mist? It also could be water flying off the packing gland when under power.
I would check the muffler again under power.

Fair Winds

Dave
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #9  
Old 04-28-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
Its def not the muffler or the stuffing box - I am sure of that. Thats why this is confusing me so much because I cannot see what is going on inside of that fiberglass triangle that the muffler is sitting on and the shaft log goes in to.

What is usually surrounding the shaft log? Is it solid fiberglass or is it a hollow area?
__________________
Morgan 323
Reply With Quote Share with Facebook
  #10  
Old 04-28-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
I'd hope it was solid fiberglass.
Quote:
Originally Posted by nk235 View Post
Its def not the muffler or the stuffing box - I am sure of that. Thats why this is confusing me so much because I cannot see what is going on inside of that fiberglass triangle that the muffler is sitting on and the shaft log goes in to.

What is usually surrounding the shaft log? Is it solid fiberglass or is it a hollow area?
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
Reply


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
Tricky Shaft Log Leak Repair JonG Gear & Maintenance 7 04-27-2009 09:00 PM
Replacing Cutlass Bearing SeaDeucer Gear & Maintenance 15 04-17-2009 03:41 PM
Shaft Log Leak R33 Gear & Maintenance 4 06-26-2002 10:28 AM
A Worn Shaft Log Tom Wood Gear and Maintenance Articles 0 10-06-1999 08:00 PM
The Stuffing Box and Stern Tube Tom Wood Gear and Maintenance Articles 0 04-27-1999 08:00 PM


All times are GMT -4. The time now is 09:20 PM.

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.