F-RIB 360 letting in water

Folding Ribs are a great way of obtaining a hard hull boat but having the flexibility of a sib.
F-Ribs have the 3 or 4 section articulating hinge joint that allow the boat to fold up for ease of storage or transportation.
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Phil
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F-RIB 360 letting in water

Post by Phil » 08 May 2018, 14:44

Over the three BH weekend days I was out on the water, I noticed that the rear section of my F-RIB 360 is letting in water, but I can’t work out where from :scratch. It’s a lot more than a dribble – a good couple of inches at the deepest point of the boat.

Even when the boat is stationary in the water, water is coming in fairly quickly, but not quick enough for me to be worried about the boat’s seaworthness. It seems to stop at around the couple of inches mark (presumably level with the sea), although I was bailing it out fairly frequently.

The plug is firmly in, so I don’t think the water is coming from there. I mollcoddle the boat when launching/beaching and it has no dings or scrapes on the underside, or signs of the tube fabric coming away from the fiberglass hull.

The only other potential weakspot I could think off is the hole where the bolt goes through. I noticed that the wing nut was a little looser than the very tight I do it up when inflating the boat, presumably because the rubber had expanded in the sun and was then cooled by the cold water. However, the back of the boat still filled up after I’d tightened the wingnut again.

Does anyone else who owns/has owned an F-RIB have any ideas where the water might be coming in :help? If not, I’ll try inflating the boat in the garden next weekend, pouring water in to the back section and seeing if it drips anywhere. The boat is under a year old and has been used less than 20 times, so hopefully it's something that can be fixed under warranty if there's an issue that's not a simple DIY fix.
F-RIB 360 with F-RIB wheels, seat cushions and bag and Scotty rod rests
15hp 1992 Johnson GT 10 2-stroke

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Paul
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Re: F-RIB 360 letting in water

Post by Paul » 08 May 2018, 21:15

Phil
By way of the hull design a small amount of water is expected to seep between the hinging hull faces ..... well it did on mine.
In your case it seems excessive and suspect either water is ingressing past the 'top hat' bushes that the fixing bolt passes through between the mid to rear hull section or through the hull draining fitting.
Mine on its first launch let water in past the drain fitting, I removed it to discover a lack of marine silicone applied during manufacture :roll: so simply removed it and applied more marine grade silicone which cured it :thumbsup
I suspect you're suffering the same fault :idea:
:cheers
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Martin
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Re: F-RIB 360 letting in water

Post by Martin » 09 May 2018, 08:00

Just keep your eye out for cracks Phil.
My boat always has water in the bottom, but that usually due to the idiot on the tiller :yay
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Because it's a big old WWworld out there :mrgreen:

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Phil
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Re: F-RIB 360 letting in water

Post by Phil » 09 May 2018, 18:33

Paul wrote:Phil
By way of the hull design a small amount of water is expected to seep between the hinging hull faces ..... well it did on mine.
In your case it seems excessive and suspect either water is ingressing past the 'top hat' bushes that the fixing bolt passes through between the mid to rear hull section or through the hull draining fitting.
Mine on its first launch let water in past the drain fitting, I removed it to discover a lack of marine silicone applied during manufacture :roll: so simply removed it and applied more marine grade silicone which cured it :thumbsup
I suspect you're suffering the same fault :idea:
:cheers
Nice one, thanks for the tip Paul :TY. I'll buy and apply some silicone to bushes and drainning fitting/plug and see if that sorts things out.

Cheers,

Phil
F-RIB 360 with F-RIB wheels, seat cushions and bag and Scotty rod rests
15hp 1992 Johnson GT 10 2-stroke

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Phil
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Re: F-RIB 360 letting in water

Post by Phil » 09 May 2018, 18:34

Martin wrote:Just keep your eye out for cracks Phil.
My boat always has water in the bottom, but that usually due to the idiot on the tiller :yay
:lol:. No signs of cracks, fortunately!
F-RIB 360 with F-RIB wheels, seat cushions and bag and Scotty rod rests
15hp 1992 Johnson GT 10 2-stroke

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The Hobbit
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Re: F-RIB 360 letting in water

Post by The Hobbit » 09 May 2018, 19:25

crack.JPG
I've a SIB but have a big crack in it :rofl :wedgie
I'm not really a Hobbit, just look like one. Real name is "Andy".

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Phil
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Re: F-RIB 360 letting in water

Post by Phil » 09 May 2018, 19:55

The Hobbit wrote:
crack.JPG
I've a SIB but have a big crack in it :rofl :wedgie
Lol!


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F-RIB 360 with F-RIB wheels, seat cushions and bag and Scotty rod rests
15hp 1992 Johnson GT 10 2-stroke

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Paul
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Re: F-RIB 360 letting in water

Post by Paul » 09 May 2018, 20:26

Phil wrote: I'll buy and apply some silicone to bushes and drainning fitting/plug and see if that sorts things out.

Phil
Phil
I'm confident you'll only have to address the 'bung' drain fitting with it being the 'main suspect' :thumbsup
Removal is easy, undo the outer big hex nut and withdraw it from the inner fitting. You'll soon see if there was enough silicone applied to the outer and inner faces during assembly.
I wouldn't go disturbing the top hat bushes unless you have to :no
:cheers
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Phil (10 May 2018, 08:00)
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Phil
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Re: F-RIB 360 letting in water

Post by Phil » 10 May 2018, 07:59

Paul wrote:I'm confident you'll only have to address the 'bung' drain fitting with it being the 'main suspect' :thumbsup
Removal is easy, undo the outer big hex nut and withdraw it from the inner fitting. You'll soon see if there was enough silicone applied to the outer and inner faces during assembly.
Nice one, thanks Paul. I was getting confused last night as to where the hex nut was - the boat is packed up and I don’t remember it having one.

I quick trawl through some photos and I see what you mean now. It looks like I’ll need to buy a bigger spanner!
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F-RIB 360 with F-RIB wheels, seat cushions and bag and Scotty rod rests
15hp 1992 Johnson GT 10 2-stroke

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Paul
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Posts: 2963
Joined: 30 Dec 2014, 21:46
Boat Make: Mercury Ocean Runner 420
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Has thanked: 447 times
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Re: F-RIB 360 letting in water

Post by Paul » 10 May 2018, 21:28

Yup that's the one Phil :thumbsup
A adjustable pair of grips will do the job as it's not very tight being made of plastic mate
pair-mole-grips-steel-adjustable-jaws-increased-torque-used-diy-maintenance-construction-isolated-white-35279639.jpg

:cheers
I walked through the door marked 'EXIT' and life is now good!

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