Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 14-03-2019, 18:21   #16
Registered User

Join Date: Jan 2016
Location: San Diego, CA
Boat: Beneteau 40.7
Posts: 159
Re: Beneteau First 47.7 Bilge leak

The water should be coming in from a specific direction. On my 40.7 I can see the keel attachment nuts under the floorboards. There are limber holes in the structural grid into the bilge area. Lightly plug them with rags and see which ones get wet. Make sure that there is no problem in the engine compartment. I keep a careful eye on the big elastic gland in the saildrive penetration. I see no degradation after 15 years but it would be a critical point of failure. I will replace mine soon.
__________________

thunderhoof is offline   Reply With Quote
Old 14-03-2019, 21:46   #17
Registered User

Join Date: Oct 2006
Location: New Zealand
Posts: 29
Re: Beneteau First 47.7 Bilge leak

Talcom powder.
Sprinkle around and out from where it collects, and after time you will see the path of the water and be able to track to the source. The excess powder will do no harm and is easily removed after.
__________________

bill99 is offline   Reply With Quote
Old 15-03-2019, 05:36   #18
Registered User

Join Date: Sep 2011
Location: Tarpon Springs fl
Boat: Morgan 384/ 1982
Posts: 303
Images: 3
Re: Beneteau First 47.7 Bilge leak

When looking for leaks I use the blue paper towels Under any potential places. A week later if all the towels are dry than you have a big problem ! 12 to 20 paper towels around the key places will at least show you where its not leaking !
Good luck
stnick is offline   Reply With Quote
Old 15-03-2019, 10:04   #19
Marine Service Provider
 
O_salt's Avatar

Join Date: Sep 2010
Location: Bellevue, Wa.
Boat: Beneteau, First 47.7, 48.5', Flyer
Posts: 37
Re: Beneteau First 47.7 Bilge leak

Quote:
Originally Posted by gmakhs View Post
I don't think the keel bolts can leak into the grid , but if you do the re torque make sure to apply the correct tension as BENETEAU states .
Hi, do you know what this torque number would be?
O_salt is offline   Reply With Quote
Old 15-03-2019, 10:10   #20
Marine Service Provider
 
O_salt's Avatar

Join Date: Sep 2010
Location: Bellevue, Wa.
Boat: Beneteau, First 47.7, 48.5', Flyer
Posts: 37
Re: Beneteau First 47.7 Bilge leak

Hi, I had forgotten about the wheel well thru-hull. I will check that.

I have a new PSS shaft seal, I replaced the Volvo shaft seal this fall when I hauled out. No leaks around the shaft, this area is easy to track as it leaks into the engine sump and collect at the forward end of this bilge which has a bilge alarm installed there.
O_salt is offline   Reply With Quote
Old 16-03-2019, 07:11   #21
Registered User
 
svHyLyte's Avatar

Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,808
Images: 25
Re: Beneteau First 47.7 Bilge leak

Quote:
Originally Posted by O_salt View Post
Hi, do you know what this torque number would be?

See the attached table from Beneteau's technical bulletin on replacing keel bolts/nuts. On your boat an average of about 150 Lb-ft would do the trick.
Attached Files
File Type: pdf Keel Bolt Torque.pdf (15.6 KB, 10 views)
__________________
"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
svHyLyte is offline   Reply With Quote
Old 16-03-2019, 22:11   #22
Registered User
 
B00B00's Avatar

Join Date: Apr 2017
Location: New Zealand
Boat: Beneteau Oceanis 50 'Rogue'
Posts: 96
Re: Beneteau First 47.7 Bilge leak

I had what I thought was a leak in my beneteau oceanis 50 bilge but it turned out to just be a faulty non return valve in the bilge pump hose. Tried everything for months to find the leak, paper towels everywhere, closing seacocks ect but the sump kept filling. Would pump it out and then the next day it would be full again.
Don't think that would account for 4 gallons but at least 1 or 2. You would be surprised how much the pipes can hold. I made a container out of a 5l water bottle to put both bilge pump pick ups in so I could see if it was the hoses or something else. Was a happy day when I saw the sump was dry.
B00B00 is offline   Reply With Quote
Old 18-03-2019, 08:39   #23
Registered User

Join Date: Oct 2018
Location: Northern Virginia
Boat: Beneteau First 47.7
Posts: 10
Re: Beneteau First 47.7 Bilge leak

Quote:
Originally Posted by B00B00 View Post
I had what I thought was a leak in my beneteau oceanis 50 bilge but it turned out to just be a faulty non return valve in the bilge pump hose. Tried everything for months to find the leak, paper towels everywhere, closing seacocks ect but the sump kept filling. Would pump it out and then the next day it would be full again.
Don't think that would account for 4 gallons but at least 1 or 2. You would be surprised how much the pipes can hold. I made a container out of a 5l water bottle to put both bilge pump pick ups in so I could see if it was the hoses or something else. Was a happy day when I saw the sump was dry.


B00B00, same issue in my boat, every time you pump and stop pumping when you hear air gurgling, the water in the hose flows back into the sump, about one gallon, could be more. Am fixing nonreturn valve.
Paradoxus is offline   Reply With Quote
Old 18-03-2019, 14:43   #24
Registered User

Join Date: Sep 2011
Location: Tarpon Springs fl
Boat: Morgan 384/ 1982
Posts: 303
Images: 3
Re: Beneteau First 47.7 Bilge leak

Glad you found it . Just sometime , i feel the boat plots against me !!!!!!!!
__________________

stnick is offline   Reply With Quote
Reply

Tags
beneteau, bilge

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
Swing keel leak pivot leak. Need help! sgumedic Construction, Maintenance & Refit 0 09-03-2015 20:44
Lazarette Leak + Cabin Leak, short & long term fix? watanaka Construction, Maintenance & Refit 5 09-03-2014 13:25
Beneteau First 38 or First 405? 40 South Monohull Sailboats 29 29-08-2013 15:24
First boat, first post, first adventure. northoceanbeach Pacific & South China Sea 5 28-05-2013 18:05
First Boat, Beneteau First 285? nadsb Monohull Sailboats 6 29-02-2012 09:16



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:04.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.