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12 July 2014, 08:50
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#1
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Member
Country: UK - Scotland
Town: KELSO
Boat name: BITER
Make: NORTHCRAFT 6M
Length: 6m +
Engine: SUZUKI DF115 4STROKE
Join Date: Apr 2007
Posts: 25
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Northcraft sub floor flooding
I have a problem with my Northcraft 6,2 flooding below the deck and have tried to bilge pump it by installing a rule bilge pump with little success.It is very hard to gain access to the compartment .I have been able only to shove it in through where the cables go and push it forward.
When I trailer the rib and I take out the bung a good 10 mins worth of water decants itself..This I guess may amount to 200-300l..Therefore a considerable weight... it affects the boat getting on the plane and increases the consumption.
I am resisting the temptation to bore an access hole through the deck.Does anyone have any better suggestions ?
Woodski
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12 July 2014, 10:57
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#2
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,163
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If you're taking so much water, there's summat seriously wrong. I'd be more concerned about how it's getting in & stopping it, rather than pumping it out.
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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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12 July 2014, 11:33
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#3
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Member
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 6,203
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I agree with Dave. Does it take on the same amount of water no matter what sea state?
Sent from my iPhone using RIB Net
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jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
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12 July 2014, 11:37
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#4
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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Quote:
Originally Posted by Pikey Dave
If you're taking so much water, there's summat seriously wrong. I'd be more concerned about how it's getting in & stopping it, rather than pumping it out.
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Defo! Checking bung fitting (hull drain plug), bow eye fitting or anything else which has been fitted which required drilling either floor or hull. You really don't want water in there.
You could try recovering the boat onto the trailer when you know that there's water in there and try to see where it's coming out from.
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12 July 2014, 13:38
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#5
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,090
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Taste it to see of its salt or fresh after a dry run .. that amount would sound like salt to me .. if its fresh, thats a lot of rain water, and its getting in round your fixtures and fittings. I had a 6.2 NC that did this and it was a pain.
Fitting a bilge pump helped but they always got shaken to bits and the day you didnt check to see it was alright, was the day it rained like sh*t .. and the pump casing had split
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13 July 2014, 14:23
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#6
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Member
Country: UK - Scotland
Town: KELSO
Boat name: BITER
Make: NORTHCRAFT 6M
Length: 6m +
Engine: SUZUKI DF115 4STROKE
Join Date: Apr 2007
Posts: 25
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Water is not getting in via the bung as it does not leak when trailered then when bung removed it pisses out.I suspect water is getting at back of the rib where 2 stowage lockers are. There is bit of cracking around these in glass fibre which I have repaired a couple of times. When recovering divers or in heavy seas there can be quite a lot of water which drains to a sump and the bilge pump in there deals with it no problem
Thats why i am trying to pump it out below deck but cannot quite locate the pump because of limited access.
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13 July 2014, 18:36
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#7
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Member
Country: UK - England
Town: Exeter
Make: Highfield
Length: 5m +
Engine: Honda BF90
Join Date: Mar 2013
Posts: 272
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Hi
Please remember the pressure against the bung below the water line will be far greater than a few litres from the hull, so don't discount bung/hull fittings.
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Happy when wet!
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13 July 2014, 19:50
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#8
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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Quote:
Originally Posted by woodski
Water is not getting in via the bung as it does not leak when trailered then when bung removed it pisses out.I suspect water is getting at back of the rib where 2 stowage lockers are. There is bit of cracking around these in glass fibre which I have repaired a couple of times. When recovering divers or in heavy seas there can be quite a lot of water which drains to a sump and the bilge pump in there deals with it no problem
Thats why i am trying to pump it out below deck but cannot quite locate the pump because of limited access.
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Again, you need to stop it getting in there, rather than pumping out when it does.
Working through and addressing the possible areas of ingress would be my approach.
It maybe worth taking the bung and bung surround out, checking the O ring and resealing it back in with sikaflex when the area is totally clean and dry. Replace the bung if you're unsure of its health, they're not expensive.
If that doesn't fix it, move on to those cracked boxes.
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13 July 2014, 21:22
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#9
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Flood the deck, connect a bellows pump to the drain plug hole and pump away while looking for bubbles.
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13 July 2014, 22:24
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#10
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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Quote:
Originally Posted by Downhilldai
Flood the deck.....
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Wasn't there a video somewhere of you demonstrating how to flood a Northcraft deck whilst sat in it?
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13 July 2014, 22:51
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#11
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Member
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,767
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I've used a 12v car tyre pump connected to hose pipe
. pipe pushed through bung and sealed with plasticine.
Turn on pump. Work round every seam and fitting with soapy water... I found a fitting that had been put in without sealant...
Make sure pressure does not get too high.
Start with cracks...
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13 July 2014, 23:02
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#12
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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Quote:
Originally Posted by ShinyShoe
I've used a 12v car tyre pump connected to hose pipe
. pipe pushed through bung and sealed with plasticine.
Turn on pump. Work round every seam and fitting with soapy water.....
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Something like that.
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14 July 2014, 16:28
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#13
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Member
Country: UK - Scotland
Town: KELSO
Boat name: BITER
Make: NORTHCRAFT 6M
Length: 6m +
Engine: SUZUKI DF115 4STROKE
Join Date: Apr 2007
Posts: 25
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Hi Guys thanks for your interest and suggestions and no I dont recall a video of the flooded boat although it has had plenty on our last trip around Coll.
With regard to the bung I replaced the o ring surrounding it and have put a smear of waterproof grease around it.
I suppose the Northcraft builders had seen this as an obvious problem and thats why the drain bung was put in
I will try to flood the deck and seen where the bubbles emerge or where water drains to
Cheers Woodski
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14 July 2014, 20:21
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#14
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,893
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Some of the more obvious leak locations are the bung fitting itself, around the drain sock/s and any other through hull fittings you may have. A loose fitting tape on a tube is another good one - an open inch might allow water to jet into the space BEHIND the tube (maybe around the transom boxes). It takes more than a few divers to introduce 200L of water into a boat.
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