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Water inside foil mast

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Created by mob dog 8 months ago, 5 Apr 2025
mob dog
NSW, 290 posts
5 Apr 2025 11:19AM
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My starboard supercriuser aluminium mast has water trapped inside, quite a bit by the sound of it and I'm wondering if this is a problem and is it possible to remove it and prevent it happening again by sealing some part of it.





ptsf1111
WA, 454 posts
5 Apr 2025 9:32AM
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Have the same with my alu mast and open it every few sessions to get rid of it. Some leaks out when holding it upside down. In my case the base and mast parts don't accurately align, resulting in some water ingress. Guess that's what you get with cheap stuff but I'd expect slightly better from a brand like NP.

The torx screw at the top is probably holding the mast. Bit surprised it's only one screw in your case but I'd loosen that to separate the parts once every so often. I wouldn't seal it.

When tightening, you might want to apply some lubricant like Tef Gel to prevent parts from corroding.

mob dog
NSW, 290 posts
5 Apr 2025 12:35PM
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Select to expand quote
ptsf1111 said..
Have the same with my alu mast and open it every few sessions to get rid of it. Some leaks out when holding it upside down. In my case the base and mast parts don't accurately align, resulting in some water ingress. Guess that's what you get with cheap stuff but I'd expect slightly better from a brand like NP.

The torx screw at the top is probably holding the mast. Bit surprised it's only one screw in your case but I'd loosen that to separate the parts once every so often. I wouldn't seal it.

When tightening, you might want to apply some lubricant like Tef Gel to prevent parts from corroding.


Yes I did remove that screw but the tuttle head does not come off, I don't think that is how it is attached

thedoor
2469 posts
5 Apr 2025 10:31AM
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Tried leaving it in the sun?

mob dog
NSW, 290 posts
5 Apr 2025 1:47PM
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thedoor said..
Tried leaving it in the sun?



No I have not tried that yet, it sounds like there is a large amount in there, I was hoping to take the top and bottom of and drain it and see if i can see how its getting in there and stop it entering inside

tonyk
QLD, 594 posts
5 Apr 2025 2:14PM
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I would consider drilling a hole to drain it and just except that it will be full of water during your foiling sessions.
The old NP Ali masts took water during the session and it didn't seem to matter from what I could tell.

mob dog
NSW, 290 posts
5 Apr 2025 3:45PM
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I thought that the top and bottom sections might be removable somehow

mob dog
NSW, 290 posts
5 Apr 2025 4:39PM
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Update: The top and bottom plastic sections are just held on by the barrel nuts, just punch them out and it comes apart, the centre sections of the mast are sealed with some type of resin, drilled 2 small holes in that and water drained straight away, but that is the least of my problems now, after removing the tutle adaptor I found a crack where the rear barrel nut inserterts through the aluminium






ptsf1111
WA, 454 posts
5 Apr 2025 5:53PM
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Be glad you found it before it failed when foiling! That's an interesting way to hold the mast with one bolt and 2 barrel nuts.

Mark _australia
WA, 23433 posts
5 Apr 2025 6:01PM
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Starboard rubbish, same as the barrel nut failures in the carbon masts

mob dog
NSW, 290 posts
5 Apr 2025 9:49PM
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ptsf1111 said..
Be glad you found it before it failed when foiling! That's an interesting way to hold the mast with one bolt and 2 barrel nuts.


Yes I'm glad I investigated the water ingress problem or I would not have discovered this issue. Now I am left with a useless foil. At least it won't have the chance to leave me stranded out there.

mob dog
NSW, 290 posts
5 Apr 2025 9:52PM
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Mark _australia said..
Starboard rubbish, same as the barrel nut failures in the carbon masts


Only question now mark, is do I replace it with a new mast of the same type or ditch the whole foil altogether due to the risk of this happening again?

Ian85
NSW, 25 posts
5 Apr 2025 10:56PM
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I had a similar issue with my 2020 model Alloy Race mast some years ago. Started to crack at the rear barrel nut but also had a horizontal crack at the top of the mast just under the plastic Tuttle fitting. Noticed the mast flexing and after a bit of wobbling back and forth it broke, I suspect that as the crack developed it was letting the water in. Have a good look for hairline cracks???
Anyway I was able to salvage the mast by recutting the top shape under the plastic head cap with a hacksaw , then drilling new holes for the barrel nuts. The mast will about 50-60mm shorter but mine was quite usable at around 90cm.
Note. this shortened mast is still in use by one of our local light weight sailors who bought it from me 2.5 years ago.

WillyWind
579 posts
6 Apr 2025 2:01AM
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I bought my iQfoil foil with the alu mast back in 2020. Within a year the mast had hairline cracks where the barrel nut goes. I called the shop where I bought it from and was told that it was a known issue and I had two options: replace it for free with the at the time newer and reinforced alu mast or get carbon (paying the difference). I went with the carbon. In your case, you might want to get the new/reinforced alu mast because it will be WAY cheaper than switching brands. Depending on where you are, can also find extremely good deals on used carbon masts.

Mark _australia
WA, 23433 posts
6 Apr 2025 1:01PM
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I dunno..... as the carbon mast cracks sometimes where the fillet / curve bit is from the bottom of the mast to the fuse end. Its hard to spot though and opens up under load. I think they have fixed that as I haven't seen one for a while.
And the fixings failing in the carbon masts too, I guess its been a while.
I guess just don't get an older carbon mast, or ally...?

mob dog
NSW, 290 posts
29 Apr 2025 12:47PM
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Ian85 said..
I had a similar issue with my 2020 model Alloy Race mast some years ago. Started to crack at the rear barrel nut but also had a horizontal crack at the top of the mast just under the plastic Tuttle fitting. Noticed the mast flexing and after a bit of wobbling back and forth it broke, I suspect that as the crack developed it was letting the water in. Have a good look for hairline cracks???
Anyway I was able to salvage the mast by recutting the top shape under the plastic head cap with a hacksaw , then drilling new holes for the barrel nuts. The mast will about 50-60mm shorter but mine was quite usable at around 90cm.
Note. this shortened mast is still in use by one of our local light weight sailors who bought it from me 2.5 years ago.


Problem solved. Former 85cm mast is now 81cm.
It is short but it may be still useful for riding low in flatwater or helping my breach control, less room for error.


thedoor
2469 posts
29 Apr 2025 1:48PM
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Select to expand quote
mob dog said..

Ian85 said..
I had a similar issue with my 2020 model Alloy Race mast some years ago. Started to crack at the rear barrel nut but also had a horizontal crack at the top of the mast just under the plastic Tuttle fitting. Noticed the mast flexing and after a bit of wobbling back and forth it broke, I suspect that as the crack developed it was letting the water in. Have a good look for hairline cracks???
Anyway I was able to salvage the mast by recutting the top shape under the plastic head cap with a hacksaw , then drilling new holes for the barrel nuts. The mast will about 50-60mm shorter but mine was quite usable at around 90cm.
Note. this shortened mast is still in use by one of our local light weight sailors who bought it from me 2.5 years ago.



Problem solved. Former 85cm mast is now 81cm.
It is short but it may be still useful for riding low in flatwater or helping my breach control, less room for error.



legend

ptsf1111
WA, 454 posts
30 Apr 2025 12:31PM
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Well done! Guess you'll inspect that regularly going forward



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"Water inside foil mast" started by mob dog