Beneteau Antares 30 fly Concerning water in lazarette

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Popski

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Hi All

I am becoming a little concerned as to a small (3+ lts) sea water apparent in the lazarette after an hour or so of cruising around. The boat has a double skin hull and there are two drain holes (see pic) which holds quite a lot of residual water. I have on occasion pumped out 8 ltrs of sea water from here but cant see just where its been shipped. I have checked all the valves and sea cocks etc and whilst there is a build up of salt crystals in the bilge there is no apparent water under the shaft seal. Also checked whilst the engine is running in gear and see no drips etc and there was nothing. As this is a double hull skin I cant see where this water might get in. Any suggestions will be gratefully received.
 

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Hi I looked at the rudder stock but only removing the emergency tiller cover but could see no sign of any water at the back. The water appears when the boat is on the plane and bow up. Water seems to run out of these drain holes then into the lazarette rather then the other way round. So I guess the water is between the double skin . I intend to put some very absorbent cloths in this area next time I go out and double check how much is on the cloths when I get back to the pontoon. Thanks for your interest and points.
 
well that's good, narrowing down.

Is it more when water is being shipped? Could be cockpit drains blocked, or check around cockpit drains to see if any leak from hose attached to deck fitting, can be silicon sealent used coming to the end of its useful life and letting some water escape round the cockpit drains..
 
I need to check that its more when planing. I have made a small hand pump and the pipe I can push through into the drain holes. Whilst on the berth I can pump out this water into a bucket. Last week after being out for a couple of hours I removed a full bucket of sea water. Whats a bit odd the water was very discolored I would have expected it to have been fairly clean (Mediterranean waters) it was almost dark green. That maybe what ever else is in the hull I guess.
I will take a look at the deck fitting as you suggest and check them out. The boat is a 2011 build and only has 200 hours now on the clock so I am hoping that whatever the problem it might not be too serious.....
 
Fridays weather is looking ok here so I intend to have a day out and with the wife's help will have a go at your suggestions.
I feel that it might be from the shaft seal even though the engineer thought different. It make it more difficult being a dual hull can't see under the top part. Will post again after I've done the checks. Thanks again
 
Been trying to find out but no response. Been waiting for an email from Beneteau but still waiting. I think it might be foam
 
Popski said:
Hi All

I am becoming a little concerned as to a small (3+ lts) sea water apparent in the lazarette after an hour or so of cruising around. The boat has a double skin hull and there are two drain holes (see pic) which holds quite a lot of residual water. I have on occasion pumped out 8 ltrs of sea water from here but cant see just where its been shipped. I have checked all the valves and sea cocks etc and whilst there is a build up of salt crystals in the bilge there is no apparent water under the shaft seal. Also checked whilst the engine is running in gear and see no drips etc and there was nothing. As this is a double hull skin I cant see where this water might get in. Any suggestions will be gratefully received.
Click to expand...

Although i don't know the Antares 30 i have one of the smaller ones and have looked at some of the others in the range and from what i have seen the various Antares designs have similar methods of construction so my knowledge is:-

The inner mouldings are bonded to the hull where they touch resulting in a labyrinth of spaces and channels between where water can move meaning that where the water collects may not be where it entered and the water transfers and collects in different areas after a fast passage. The hidden water can move from one end of the boat to the other as the attitude changes resulting in some coming out of the drainage holes and then getting trapped in areas above the internal mouldings fooling you into thinking the water started from there. I have had water in there and most, but not all, came from the following.

The overflow from the pressure relief valve on the calorifier had a hose that was poked into a hole drilled through the inner moulding. Because this added to some salt water that was already there it was a while before i started to look for a freshwater source. Putting the overflow into a container produced a half litre after a long run from hot engine without using any hot water.

However. Most of my water was coming through the rudder stock tube, the top of which is above sea level when at rest but with the stern down and a bit of chop water would spray out the top. I discovered the lip seal within the top bearing was worn and because the bearing housing had not been sealed correctly to the inner moulding some water came out and come went between the two mouldings. A new seal and some mastic fixed it.

I now get less water , about 2 litres after a weeks holiday, but have learnt to live with that, no idea where it comes from, now have a small hand pump with a hose i poke into one or two of the inner moulding drain holes now and again.

Hope above is of some use.

Www.solocoastalsailing.co.uk
 
Hi Plum
Thanks ever so much for your detailed response and insight. I will now make a thorough check of the areas you mention. I have had recently fitted a replacement trim tab and wasn't sure if that was the problem. I think I have eliminated that one now but will look closer to the rudder stock and calorifier. Thanks for you input.
 
Apologies for resurrecting a three year old thread, but was there a resolution to your problem @Popski?

I am experiencing the exact same issue, but with an Antares 8. Takes in water when underway but not when in berth. All through hull fittings and valves have been checked and shaft seal replaced. Salt water seems to seep from one of the port stringers but given the double hull construction, the water may very well be coming from elsewhere. The majority of the water makes it to the bilge where it is pumped out when underway. The remaining water is about 10 litres that I manually have to pump out using a wet vacuum cleaner.
 
rpetersson said:
Apologies for resurrecting a three year old thread, but was there a resolution to your problem @Popski?

I am experiencing the exact same issue, but with an Antares 8. Takes in water when underway but not when in berth. All through hull fittings and valves have been checked and shaft seal replaced. Salt water seems to seep from one of the port stringers but given the double hull construction, the water may very well be coming from elsewhere. The majority of the water makes it to the bilge where it is pumped out when underway. The remaining water is about 10 litres that I manually have to pump out using a wet vacuum cleaner.
Click to expand...
I was getting 3-4 litres of water in the bilge after a run in my 760. Turned out not to be the stern gland as I suspected but a leaking sea water cooling pump. Changed the pump and all nice and dry now.
 
rpetersson said:
Apologies for resurrecting a three year old thread, but was there a resolution to your problem @Popski?

I am experiencing the exact same issue, but with an Antares 8. Takes in water when underway but not when in berth. All through hull fittings and valves have been checked and shaft seal replaced. Salt water seems to seep from one of the port stringers but given the double hull construction, the water may very well be coming from elsewhere. The majority of the water makes it to the bilge where it is pumped out when underway. The remaining water is about 10 litres that I manually have to pump out using a wet vacuum cleaner.
Click to expand...
Hi. I eventually narrowed the water ingress from the starboard interceptor I had the original replaced with a new one which was improperly sealed so when underway and the interceptor deployed must have dragged water in through the transom. Had that one replaced and hardly any water now perhaps a cup full but I can live with that.
 
Thanks for your swift reply!

@Jamie Dundee: Great you found the root cause of your problem! My sea water pump seems to be working - no water leaking from impeller housing or any connections. Checked during cruising speed of 15 knots. Kinda scary to be crawling next to the moving belts... ;)

@Popski: Thanks for your input. I will continue trying to narrow down the issue (no interceptors on my boat). I am beginning to suspect the rudder stock tube, but I would need to haul the boat to confirm this theory. No water visible water ingress, so it must be coming from the void between the outer an inner hull.
 
Hi, just found this.
I'd literally just started a thread about troubling water ingress problems this week in my Antares 760.
Water has started pooling under the foward floor, comes in when boat sat on mooring at rest - a few litres an hour.
The double hull around the toilet area has 2 seacocks for the inlet/outlet.
Unfortunately this means that whilst I seem to have narrowed it down to this area I can't actually see if they are leaking from the outer hull entry point.
Beneteau Antares leaking - toilet seacocks span double hull (inner and outer)?

Any thoughts?
 
Pleinmont said:
Hi, just found this.
I'd literally just started a thread about troubling water ingress problems this week in my Antares 760.
Water has started pooling under the foward floor, comes in when boat sat on mooring at rest - a few litres an hour.
The double hull around the toilet area has 2 seacocks for the inlet/outlet.
Unfortunately this means that whilst I seem to have narrowed it down to this area I can't actually see if they are leaking from the outer hull entry point.
Beneteau Antares leaking - toilet seacocks span double hull (inner and outer)?

Any thoughts?
Click to expand...
If my boat was taking on a few litres of water an hour, unless I could quickly determine the source, I think I'd have it lifted. You don't want to be relying on your bilge pumps for an extended period of time.
 
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Pleinmont said:
Hi, just found this.
I'd literally just started a thread about troubling water ingress problems this week in my Antares 760.
Water has started pooling under the foward floor, comes in when boat sat on mooring at rest - a few litres an hour.
The double hull around the toilet area has 2 seacocks for the inlet/outlet.
Unfortunately this means that whilst I seem to have narrowed it down to this area I can't actually see if they are leaking from the outer hull entry point.
Beneteau Antares leaking - toilet seacocks span double hull (inner and outer)?

Any thoughts?
Click to expand...
I had a leaky seacock when the boat was launched, the water collected in the well for shower water under the wooden floor panel in the heads.
 
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