NC11 water leaks

[wiseowl3]

Hi, this is my first post and wondered if any other NC11 owners are having the problem that I’ve got which is taking in water through the port engine air vent which builds up in the two sections under the port engine but doesn’t seem to get into the bilge. This only happens in heavy sea 1 metre plus on the port side. If it happens on the starboard side I can’t tell because there is a hole to let the water drain away on that side so no water builds up. I’m wondering if I can drill the same hole in the port side and if anyone else is having this problem or has solved it. I’m am particularly concerned as I’m fed up with pumping up to 20 litres Of water out because as it is getting on the wiring which is bound to cause a problem eventually. 

[belmar]

Hi,
Welcome on this forum. You mention that the water builds up in the two sections under the port engine. Do you mean that water is building up between the inner en outer mold under the port engine....?
When it builds up directly under the port engine it should find it’s way to the bilge pump because there is (supposed to be) a large hole from there to the place where the bilge pump is situated. When the water builds up between the molds (hull being the outer mold): I had the same experience and it was due to an failing hole between that room and the bilge. Solution: open up the bottom and drill a hole. The polyester guy at our yard did so and I never had a problem anymore. I thought it was done as Jeanneau guarantee job.  

Let me know if we are talking about the same....

CU
Remko

[wiseowl3]

Feb 9, 2018 1:22:47 GMT belmar said:

Hi,
Welcome on this forum. You mention that the water builds up in the two sections under the port engine. Do you mean that water is building up between the inner en outer mold under the port engine....?
When it builds up directly under the port engine it should find it’s way to the bilge pump because there is (supposed to be) a large hole from there to the place where the bilge pump is situated. When the water builds up between the molds (hull being t to an failing hole between that room and the bilge. Solution: open up the bottom and drill a hole. The polyester guy at our yard did so and I never had a problem anymore. I thought it was done as Jeanneau guarantee job.  

Let me know if we are talking about the same....

CU
Remko

[wiseowl3]

Feb 9, 2018 1:30:48 GMT wiseowl3 said:

Feb 9, 2018 1:22:47 GMT belmar said:

Hi,
Welcome on this forum. You mention that the water builds up in the two sections under the port engine. Do you mean that water is building up between the inner en outer mold under the port engine....?
When it builds up directly under the port engine it should find it’s way to the bilge pump because there is (supposed to be) a large hole from there to the place where the bilge pump is situated. When the water builds up between the molds (hull being t to an failing hole between that room and the bilge. Solution: open up the bottom and drill a hole. The polyester guy at our yard did so and I never had a problem anymore. I thought it was done as Jeanneau guarantee job.  

Let me know if we are talking about the same....

CU
Remko

Thanks for the response, yes that is exactly what’s happening. I appear to have missing drain holes. I took this up with Sea Ventures but they were very helpful with getting the water out the first time but not much follow up. I’ll get a camera down there and compare with another NC11 and drill the missing holes if I can’t get any response from Jeanneau. Thank you again.

[belmar]

Some of my text went wrong but I ment water building up between the hull and the inner mold under the engine: you can not see the water there but hear it when you push on the bottom. 

[wiseowl3]

Feb 9, 2018 1:45:34 GMT belmar said:

Some of my text went wrong but I ment water building up between the hull and the inner mold under the engine: you can not see the water there but hear it when you push on the bottom. 

No the water is in the section directly under the engine and the section to the outside of that. It gets trapped there because there is no drain hole in the secondary moulding which is noticeable on the starboard side do no build up on that side

[belmar]

In the space directly under both engines there are no holes (both sides) in my boat. There is an overflow point though to the space where the bilge pump is situated. But that overflow is on the back of the engine room and is hard to see. The holes you are talking about are in my boat drilled in the center space between the engines: 3 of them, leading to the bilge pump space. Water that comes in from the vent is on the side of the engine and should find it’s way between the hull and the mold under the engine to the bilge pump. That way was blocked at my port side so water was collecting there in the cable area you mentioned earlier and between the hull and the inner mold. If there is any water in the space directly under your engine I would recommend you to check te sealing of the waterpump: there are two of those: one is the O-ring behind the impeller cover, the other is on the back of the impeller housing: a ceramic seal. Both can leak (and already did so in my boat) They cause a nice amount of seawater in the room directly under the engine. (when you are underway, when moored there is almost no leaking) So I guess that what I am trying to say is that it is not very likely that water coming through the vent is the only cause of filling the space directly under your engine with such an amount of water.


CU

Remko 

[wiseowl3]

Feb 9, 2018 14:10:39 GMT belmar said:

In the space directly under both engines there are no holes (both sides) in my boat. There is an overflow point though to the space where the bilge pump is situated. But that overflow is on the back of the engine room and is hard to see. The holes you are talking about are in my boat drilled in the center space between the engines: 3 of them, leading to the bilge pump space. Water that comes in from the vent is on the side of the engine and should find it’s way between the hull and the mold under the engine to the bilge pump. That way was blocked at my port side so water was collecting there in the cable area you mentioned earlier and between the hull and the inner mold. If there is any water in the space directly under your engine I would recommend you to check te sealing of the waterpump: there are two of those: one is the O-ring behind the impeller cover, the other is on the back of the impeller housing: a ceramic seal. Both can leak (and already did so in my boat) They cause a nice amount of seawater in the room directly under the engine. (when you are underway, when moored there is almost no leaking) So I guess that what I am trying to say is that it is not very likely that water coming through the vent is the only cause of filling the space directly under your engine with such an amount of water.


CU

Remko 

Thank for your response, I assumed the water being sea water was leaking in from the port engine vent, and Sea Ventures checked out the possibility of an engine leak. I will have a much closer look tomorrow when I get to the boat but this leak happened both before and after it was serviced with the impellers replaced!
David