Leaking main deck hatch

[Leo]

Hi fellow sailors,

I noticed a couple of messages mentioning water leaking from main
sliding hatch (I assume). Ours did as well, but only when overwhelmed by
a large wave on deck. The amount of water getting into the halliard
channels next to the hatch was more than the drain holes could cope
with, so the water level would overflow into the boat. (This may have
been made worse by the existence of our added aft-entrance sliding-hatch
garage). We solved it by reducing the gaps around the sliding hatch, on
the sides and aft edge. On the aft side we added a fixed teak batten. On
the sides we added thin flexible strips of polycarbonate sheet (Lexan)
to the slanted edge of the deck moulding, almost touching the sliding
hatch (using double tape and vinyl tape). Now any large amount of water
on the hatch drains quite slowly into the halliard space, and never into
the boat.

Leo (s/y Firefly, #6)

[Micke]

Hi Leo,

I have the same issue with my boat.

And its not just waves, its also leaking in during normal rain.

Can you please post some photos of how it looks on your hatch?

Thanks!

Kr. Michael

[Leo]

Hi Michael,

Unfortunately I am not near my boat now and have no photos on hand to show you. My best explanation was in my post. But since you mention leaking during normal rain, I wonder if there is another problem. Where exactly does the water enter the boat?

Are the halliard channel drain holes free?

Any water on the sliding hatch that runs over the edge could follow the underside of the hatch and come inside by capillary action if there is no drip edge. A drip edge is simply a small downward pointing edge along the hatch aft and sides, where running water leaves the hatch.

Leo

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[Micke]

Hi Leo,

Thanks, I will take a closer look at my hatch.

I´m pretty sure however that I have the drip edge as described.

I flushed the draining holes when I noticed the leakage the first time but they were not clogged.

The water is dripping down at the back left edge of the hatch. (facing the prow) The wood strip in that corner is getting black so I guess its been going on for quite some time.

I have been inspecting Per S IW40 and he´s got a cover over the hatch, the same as I have seen you also have. 

As an alternative solution to this problem I am considering getting one made for my boat.

But I will take a closer look first and perhaps unscrew and raise the top to get full access.

If I find whats causing the leak I will let the group know.

Btw, just as many others I have also been looking for the hull number without success. But... I found that my diesel tanks were pressure tested & approved in 1975.

Does anyone els have these badges on the fueltanks? Is this then related to the boats manufacturing year?

The Bowman heat exchanger is marked 9 -79

  

All input is appreciated.

Kr. Michael

Ps. Adding some pictures below.

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[Gunnar Høie]

Hi all;

As for the drain holes from the halliard channels I have noticed that they are very small and are easily clogged. If clogged they don't work obviously. Otherwise we have not noticed leakages from the hatch (yet).

With regard to the hull number I got hold of an early contract where it is stated that I have number 14 from 1979.  However the previous owner mentioned something about that it was in reality number 18 and that for taxreasons they had written number 14.  Strange story but I have now put number 14 on my registration papers since that is what I can document.

And Michael: That sprayhood of yours - where did you get that made? Leo has shown pictures of the one on Firefly but yours seem larger  - and we are still looking for a solution.  Perhaps it would be possible to get som closeup photos or info about who may have the measurements / drawings for the one on your boat?

Gunnar (Fiona # 14)   

[michael ojing]

Hi Gunnar,

My sprayhood was already on the boat when I bought it and I dont have any contact with the previous owner so I cant check who made it.

Here are 2 more photos.

Just tell me what you need and I will take photos for you.

Kr. Michael

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[Leo]

Dear Michael,

Is that a dark window into the aft cabin from the cockpit?

That's a very good looking spray-hood with a custom moulding at the base. Are you still able to put winch handles on those 2 small halliard winches?

The deck space just in front is a bit of a water catcher. Have you had a wave fill it to the brim yet and did any water come through the hatch? On Firefly that's the cockpit entrance hatch garage, so it's level with the higher cabin top.

On another note, our halliard line brakes were originally mounted on wood spacers (below the removable deck cover) which rotted away, loosening the mounting bolts, and making a leak into the aft cabin, above the headliner. We replaced the wood with expanded PVC (a free sample of house terrace deck plank from a hardware store).

It seems no IW40 hulls have their numbers engraved. The original owner of our Firefly said it was either #5 or #6.

Regards,

Leo

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[michael ojing]

Hi Leo,

Yes, that is a removable window/hatch.

I normally use that as my entrance to the boat when In the cockpit area.

Yes, I can still use the winches, there is room enough for the handles but the winch to the right have been replaced with an electric foot operated version which works very well.

I have not had it filled with water yet but there is no signs of water entering the aft cabin so I think its ok!

I will lift my top in the following weeks to have a look all over.

Since it seems I will never find the hull number I just guess my boat was one of the first built since they started production in 1975. Judging this by the badges on the fuel tanks stating 1975.

As previosly mentioned I am curios to know if the other boats here have the same markings on their tanks and if that year follows the manufacturing year.

Kr. Michael 

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[Gunnar Høie]

Hi Michael

That sprayhoood solution looks great -  i'll look around to see if somone can make something similar for us with the molded base and such.

Gunnar

fredag 16. november 2018 06.47.03 UTC+1 skrev Leo følgende:

[Leo]

Gunnar,

Here are my 2 cents about Sparkman & Stephens bridgedecks. I know that the argument for having a high deck between the cockpit and the companionway hatch is that you cannot flood the boat if the cockpit fills. I our experience (on many boats and many oceans) that danger is a hundred times smaller than the real danger of falling overboard when crawling over the bridge deck to go down below or exit into the cockpit. When it rains it's even worse. In fact we would not have bought our IW40 if it didn't have the direct cockpit entrance (to the aft cabin), and our watch keeper rule is to never leave the safety of the inside or cockpit without notifying the other crew onboard.

Having a spray-hood over the front of the cockpit, just like having a hood over any companionway, is incredibly valuable both for rain, salt spray and sunrays. But in my opinion if one installs a spray-hood between the cockpit and the main companionway, the falling overboard risk is even greater. Of course there are sailing conditions where this is not a big concern (inshore, daytime, many crew). Having an aft cabin entrance is safe and very convenient.

Regards,

Leo Lindstrand

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